CN110819095B - Polyphenyl ether/high impact polystyrene composition and preparation method thereof - Google Patents
Polyphenyl ether/high impact polystyrene composition and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a polyphenyl ether/high impact polystyrene composition and a preparation method thereof, wherein the polyphenyl ether/high impact polystyrene composition is prepared from the following raw materials: high-viscosity polyphenyl ether resin, low-viscosity polyphenyl ether resin, high-impact polystyrene resin, styrene-glycidyl methacrylate copolymer, toluene diisocyanate, hydrogenated styrene-isoprene copolymer grafted maleic anhydride, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc. The polyphenyl ether/high impact polystyrene composition has excellent mechanical property and processing property, and can be applied to the electronic and electrical industry and the automobile industry.
Description
Technical Field
The invention relates to the field of materials, in particular to a polyphenyl ether/high impact polystyrene composition and a preparation method thereof.
Background
Polyphenylene Oxide (PPO) has the advantages of excellent mechanical property, heat resistance, electrical insulation and small creep deformation at high temperature, and the PPO has low density and hygroscopicity, high strength and good dimensional stability. However, pure PPO resin has high glass transition temperature, poor melt flowability and difficult molding processing, and needs to be processed at a high temperature of 300 ℃, thereby greatly limiting the application range of the PPO resin. In order to overcome the defects of PPO and expand the application field of the PPO, the PPO is modified by blending High Impact Polystyrene (HIPS) so as to improve the molding processability of the PPO and enable the PPO to be widely applied, but the PPO/HIPS composition with good processability and mechanical property is still difficult to obtain by the existing PPO/HIPS system.
Currently, some studies have been made in the prior art on PPO/HIPS systems, such as: chinese patent CN109735037A discloses a chemical resistance PPO/HIPS alloy material and a preparation method thereof, wherein the chemical resistance PPO/HIPS alloy material comprises the following components in parts by weight: 20-50 parts of polyphenyl ether, 35-66 parts of high impact polystyrene, 10-15 parts of flame retardant, 1-3 parts of ethylene-tetrafluoroethylene copolymer, 1-2 parts of hydrogenated styrene-butadiene block copolymer, 0.1-1 part of antioxidant and 0.1-1 part of lubricant; chinese patent CN105419210A discloses a wear-resistant reinforced PPO/HIPS material and a preparation method thereof, and the material comprises the following raw materials in parts by weight: 20-40 parts of HIPS resin, 5-30 parts of PPO resin, 3-8 parts of nitrile rubber, 3-8 parts of TPU resin, 10-30 parts of glass fiber, 10-15 parts of aramid fiber, 3-10 parts of molybdenum disulfide, 3-10 parts of calcium sulfate whisker, 1-10 parts of polytetrafluoroethylene, 0.5-1.5 parts of coupling agent, 0.5-1 part of lubricant and 0.2-0.8 part of antioxidant; chinese patent CN105199364A discloses a flame-retardant aging-resistant PPO-HIPS polymer alloy and a preparation method thereof, relating to a polymer alloy and a preparation method thereof, wherein the polymer alloy comprises the following components in parts by mass: PPO80-90, HIPS10-20, triune intumescent flame retardant 10-40, high-efficiency anti-aging agent 0.5-20, antibacterial agent 0.5-3, compatibilizer SEBS-g-MAH10-50, mica powder 1-20 and zinc oxide 0.1-5; chinese patent CN106947236A discloses a flame-retardant modified PPO-HIPS-mica powder composite material and a preparation method thereof, and the material is composed of the following raw materials in parts by weight: 650 parts of PPO powder, 350 parts of HIPS 150, 350 parts of mica powder, 20-60 parts of compatilizer, 40-70 parts of flexibilizer, 80-170 parts of flame retardant, 10-50 parts of anti-tick agent, 40-70 parts of flexibilizer, 3-20 parts of antioxidant, 3-20 parts of lubricant and 3-25 parts of toner; chinese patent CN110144109A discloses a weather-resistant high CTI halogen-free flame-retardant PPO/HIPS composite material and a preparation method thereof, wherein the composite material comprises the following components: 100 parts of PPO, 5-25 parts of HIPS10, 5-25 parts of toughening agent, 2-8 parts of light shielding agent, 5-15 parts of heat-resistant agent, 0.5-2 parts of light stabilizer, 10-25 parts of flame retardant, 1-5 parts of auxiliary flame retardant, 0.1-1 part of antioxidant and 0.1-1 part of lubricant by weight of 5 parts; chinese patent CN107541049A discloses a graphene synergistic continuous glass fiber reinforced halogen-free flame-retardant weather-resistant PPO/HIPS alloy material, which is prepared from the following components in parts by weight: 480 parts of PPO 360-grade material, 320 parts of HIPS 240-grade material, 400 parts of continuous glass fiber 200-grade material, 5-15 parts of graphene, 10-20 parts of compatilizer, 50-80 parts of flexibilizer, 80-120 parts of flame retardant, 6-10 parts of antioxidant, 3-5 parts of composite light stabilizer, 4-8 parts of lubricant and 5-15 parts of metal oxide; chinese patent CN103483798A discloses an antistatic PPO/HIPS alloy and a preparation method thereof, wherein the alloy comprises the following raw materials in parts by weight: 100-120 parts of PPO, 30-50 parts of HIPS, 10-20 parts of a toughening agent, 3000.5-1 parts of an antioxidant, 6-10 parts of monoglyceride, 5-8 parts of ethoxylated lauryl tyramine, 8-12 parts of melamine phosphate, 1-3 parts of a heat stabilizer and 1-3 parts of a lubricant.
Disclosure of Invention
Based on the above, the invention aims to provide a polyphenyl ether/high impact polystyrene composition with excellent mechanical properties and processability, which can be applied to the electronic and electrical industry and the automobile industry.
In order to achieve the purpose, the invention adopts the following scheme:
a polyphenyl ether/high impact polystyrene composition is prepared from the following raw materials in parts by weight:
35-50 parts of high-viscosity polyphenylene oxide (PPO),
25-40 parts of low-viscosity polyphenylene oxide (PPO),
10-40 parts of high impact polystyrene resin (HIPS),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the intrinsic viscosity of the high-viscosity polyphenyl ether resin is 0.45-0.51 dL/g; the intrinsic viscosity of the low-viscosity polyphenyl ether resin is 0.33-0.37 dL/g; the number average molecular weight of the high impact polystyrene resin is 17000-28000.
In some of these examples, the polyphenylene ether/high impact polystyrene composition is prepared from the following raw materials in parts by weight:
37-48 parts of high-viscosity polyphenylene oxide (PPO),
27-38 parts of low-viscosity polyphenylene oxide (PPO),
14-36 parts of high impact polystyrene resin (HIPS),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
in some of the examples, the polyphenylene ether/high impact polystyrene composition is further preferably prepared from the following raw materials in parts by weight:
40-46 parts of high-viscosity polyphenylene oxide (PPO),
30-36 parts of low-viscosity polyphenylene oxide (PPO),
18-30 parts of high impact polystyrene resin (HIPS),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
in some of the examples, the polyphenylene ether/high impact polystyrene composition is further preferably prepared from the following raw materials in parts by weight:
41-45 parts of high-viscosity polyphenylene oxide resin (PPO),
30-34 parts of low-viscosity polyphenylene oxide (PPO),
22-28 parts of high impact polystyrene resin (HIPS),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
in some embodiments, the mass fraction of the glycidyl methacrylate in the copolymer of styrene and glycidyl methacrylate is 2 to 4 wt%.
In some of the embodiments, the maleic anhydride grafting ratio of the hydrogenated styrene-isoprene copolymer grafted maleic anhydride is 0.8 to 1.5 wt%.
Another object of the present invention is to provide a process for the preparation of polyphenylene ether/high impact polystyrene compositions.
The preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 80-110 ℃ for 4-8 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a stirrer for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another stirrer for mixing;
(3) adding the mixed material obtained in the step (1) into a parallel double-screw extruder through a feeder, adding the mixed material obtained in the step (2) into the parallel double-screw extruder (totally eight zones) (for example, a fourth zone) in the lateral direction (for example, the fourth zone) for melt extrusion and granulation, wherein the process parameters comprise: the temperature of the first zone is 250-270 ℃, the temperature of the second zone is 255-275 ℃, the temperature of the third zone is 255-275 ℃, the temperature of the fourth zone is 260-280 ℃, the temperature of the fifth zone is 260-280 ℃, the temperature of the sixth zone is 260-280 ℃, the temperature of the seventh zone is 260-280 ℃, the temperature of the eighth zone is 255-275 ℃, the temperature of the die head is 255-275 ℃, and the rotating speed of the screw is 200-600 rpm.
In some embodiments, the high-viscosity polyphenylene ether resin, the low-viscosity polyphenylene ether resin and the high impact polystyrene resin are dried at a temperature of 90-100 ℃ for 4-6 hours in the step (1); the process parameters in the step (3) comprise: the temperature of the first zone is 255-265 ℃, the temperature of the second zone is 260-270 ℃, the temperature of the third zone is 260-270 ℃, the temperature of the fourth zone is 265-275 ℃, the temperature of the fifth zone is 265-275 ℃, the temperature of the sixth zone is 265-275 ℃, the temperature of the seventh zone is 265-275 ℃, the temperature of the eighth zone is 260-270 ℃, the temperature of the die head is 260-270 ℃, and the rotating speed of the screw is 300-500 rpm.
In some of these embodiments, the screw shape of the parallel twin screw extruder is a single thread; the ratio L/D of the length L of the screw to the diameter D of the screw is 35 to 50; the screw is provided with more than 1 (including 1) meshing block area and more than 1 (including 1) reverse thread area.
In some of these embodiments, the ratio L/D of the length L of the screw to the diameter D of the screw is 35 to 45; and 2 meshing block areas and 1 reverse thread area are arranged on the screw rod.
In some embodiments, in step (1) and/or step (2), the stirrer is a high-speed stirrer with a rotation speed of 500-.
The principle of the polyphenylene ether/high impact polystyrene composition of the present invention is as follows:
in order to improve the compatibility between the polyphenyl ether resin and the high impact polystyrene resin in the polyphenyl ether/high impact polystyrene composition and the defect of poor processing performance of the polyphenyl ether resin, the invention improves the compatibility between the polyphenyl ether resin and the high impact polystyrene resin by adding the styrene and glycidyl methacrylate copolymer and the hydrogenated styrene-isoprene copolymer grafted maleic anhydride, wherein the compatibility between the styrene structural unit in the styrene and glycidyl methacrylate copolymer and the hydrogenated styrene-isoprene copolymer grafted maleic anhydride and the high impact polystyrene resin is very good, the epoxy group of the styrene and glycidyl methacrylate copolymer and the anhydride group of the hydrogenated styrene-isoprene copolymer grafted maleic anhydride can react with the terminal hydroxyl group of the polyphenyl ether resin, thereby improving the compatibility between the PPO and the HIPS. Due to the fact that the processing temperature of the polyphenyl ether resin is high, chain breakage of the polyphenyl ether resin is prone to occur in the processing process, and the generation of polyphenyl ether resin oligomer is reduced and the mechanical property of the polyphenyl ether/high impact polystyrene composition is guaranteed by utilizing the reaction of the isocyanate group of toluene diisocyanate and the terminal hydroxyl group of PPO. The mechanical property of the PPO/HIPS composition is ensured by adding high-viscosity polyphenyl ether resin, and the processability of the PPO/HIPS composition is ensured by adding low-viscosity polyphenyl ether resin and high-impact polystyrene resin.
The melting point of the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide adopted by the invention is 272 ℃, the boiling point is more than 360 ℃, the thermal stability is better in the blending process of PPO and HIPS, and the hindered piperidyl of the antioxidant can provide an antioxidant effect and improve the dyeability of a copolymer; the bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate has the melting point of 239 ℃ and the thermal decomposition temperature of more than 350 ℃, has good heat resistance and hydrolysis resistance, can provide excellent color stability and melt stability for PPO and HIPS in the blending process, can prevent the thermal degradation of PPO and HIPS in the high-temperature process, can inhibit the thermal oxidative discoloration caused by long time, and can also be provided in Nitrogen Oxide (NO) x ) Color stability in gas environment, and prevention of discoloration of fumigant.
The pentaerythritol zinc adopted by the invention has the functions of lubrication and thermal stabilization, and simultaneously, when the pentaerythritol zinc is used as a thermal stabilizer alone, compared with a common zinc-containing compound (such as zinc oxide), the zinc-containing compound can effectively reduce the occurrence probability of zinc burning in the blending process.
Compared with the prior art, the invention has the following beneficial effects:
in order to improve the compatibility between the polyphenyl ether resin and the high impact polystyrene resin and the defect of poor processing performance of the polyphenyl ether resin, the compatibility between the polyphenyl ether resin and the high impact polystyrene resin is improved by adding the copolymer of styrene and glycidyl methacrylate and the hydrogenated styrene-isoprene copolymer grafted maleic anhydride, and the generation of polyphenyl ether resin oligomers is reduced by adding toluene diisocyanate, so that the mechanical property of the polyphenyl ether composition is ensured, meanwhile, the high-viscosity and low-viscosity polyphenyl ether resin is compounded to ensure the mechanical property and the processing performance of the polyphenyl ether/high impact polystyrene composition, and N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide and bis (2, the 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphates and pentaerythritol zinc improve the yellowing phenomenon and the thermal stability of the polyphenyl ether/high impact polystyrene composition in the blending processing process, and the polyphenyl ether/high impact polystyrene composition has excellent mechanical property and processing property due to the mutual matching of the raw material components, and can be applied to the electronic and electric industry and the automobile industry.
The preparation method of the polyphenyl ether/high impact polystyrene composition provided by the invention has the advantages of simple process, easiness in control and low requirement on equipment, and the used equipment is general polymer processing equipment, so that the investment is low, and the industrial production is facilitated.
Drawings
FIG. 1 is a flow chart of a process for preparing a polyphenylene ether/high impact polystyrene composition according to one embodiment of the present invention.
Detailed Description
In order to further understand the features and technical means of the present invention and achieve the specific objects and functions, the advantages and spirit of the present invention are further illustrated by the following embodiments.
The reaction mechanism of the polyphenylene ether/high impact polystyrene composition of one embodiment of the present invention is as follows (see FIG. 1 for a flow chart of the preparation process):
from the above reaction formula, the epoxy group of the styrene-glycidyl methacrylate copolymer and the anhydride group of the hydrogenated styrene-isoprene copolymer grafted maleic anhydride can react with the terminal hydroxyl group of the polyphenylene oxide resin, and meanwhile, the styrene structural unit in the styrene-glycidyl methacrylate copolymer and the hydrogenated styrene-isoprene copolymer grafted maleic anhydride has very good compatibility with the high impact polystyrene resin, so that the compatibility between the PPO and the HIPS is improved. In addition, isocyanate groups of toluene diisocyanate can react with terminal hydroxyl of PPO, so that the generation of polyphenylene oxide resin oligomer is reduced, and the mechanical property of the polyphenylene oxide/high impact polystyrene composition is ensured.
The examples of the invention and the comparative examples used the following raw materials:
high viscosity polyphenylene ether resin with intrinsic viscosity of 0.48dL/g, selected from Nantong star synthetic materials GmbH;
high viscosity polyphenylene ether resin with intrinsic viscosity of 0.55dL/g, selected from Nantong star synthetic materials GmbH;
low viscosity polyphenylene ether resin with intrinsic viscosity of 0.35dL/g, selected from Nantong star synthetic materials GmbH;
low viscosity polyphenylene ether resin with intrinsic viscosity of 0.28dL/g, selected from Nantong star synthetic materials GmbH;
a high impact polystyrene resin having a number average molecular weight of 23000 selected from taiwan qimei industries ltd;
a copolymer of styrene and glycidyl methacrylate, the mass fraction of Glycidyl Methacrylate (GMA) being 3% by weight, selected from sigma aldrich trade ltd;
toluene diisocyanate selected from the group consisting of national pharmaceutical group chemical agents;
the hydrogenated styrene-isoprene copolymer was grafted with maleic anhydride, the maleic anhydride grafting ratio was 1.2 wt%, and was selected from the group consisting of the company clony, japan;
n, N' -bis (2,2,6, 6-tetramethyl-4-piperidinyl) -1, 3-benzenedicarboxamide, selected from Toxongitai chemical Co., Ltd;
bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate selected from Shanghai Brilliant Fine chemical Co., Ltd;
pentaerythritol zinc selected from Zhaoqing Sendeli chemical industry Co., Ltd;
hydrogenated styrene-butadiene-styrene copolymer grafted maleic anhydride, selected from Shenyangtotong plastics Co.
The present invention will be described in detail with reference to specific examples.
Example 1:
the polyphenylene oxide/high impact polystyrene composition of the embodiment is prepared from the following raw materials in parts by weight:
35 parts of high-viscosity polyphenyl ether resin (the intrinsic viscosity is 0.48dL/g),
25 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
40 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 80 ℃ for 8 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 rpm) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the parallel double-screw extruder (totally eight zones) in the lateral direction (fourth zone) for melt extrusion, and granulating, wherein the process parameters comprise: the temperature in the first zone was 250 ℃, the temperature in the second zone was 255 ℃, the temperature in the third zone was 255 ℃, the temperature in the fourth zone was 260 ℃, the temperature in the fifth zone was 260 ℃, the temperature in the sixth zone was 260 ℃, the temperature in the seventh zone was 255 ℃, the temperature in the eighth zone was 255 ℃, the temperature of the die head was 255 ℃ and the rotation speed of the screw was 200 rpm.
The screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 35, and the screw is provided with 2 meshing block areas and 1 back-thread area.
Example 2:
the polyphenylene ether/high impact polystyrene composition of the embodiment is prepared from the following raw materials in parts by weight:
50 parts of high-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.48dL/g),
40 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
10 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 110 ℃ for 4 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the side direction (the fourth zone) of the parallel double-screw extruder (total eight zones) for melt extrusion and granulation, wherein the process parameters comprise: the temperature in the first zone was 270 ℃, the temperature in the second zone was 275 ℃, the temperature in the third zone was 275 ℃, the temperature in the fourth zone was 280 ℃, the temperature in the fifth zone was 280 ℃, the temperature in the sixth zone was 280 ℃, the temperature in the seventh zone was 280 ℃, the temperature in the eighth zone was 275 ℃, the temperature in the die head was 275 ℃ and the screw speed was 600 rpm.
The parallel double-screw extruder is characterized in that a screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 50, and the screw is provided with 2 meshing block areas and 1 reverse-thread area.
Example 3:
the polyphenylene oxide/high impact polystyrene composition of the embodiment is prepared from the following raw materials in parts by weight:
37 parts of high-viscosity polyphenyl ether resin (the intrinsic viscosity is 0.48dL/g),
27 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
36 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 90 ℃ for 6 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 rpm) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the side direction (the fourth zone) of the parallel double-screw extruder (total eight zones) for melt extrusion and granulation, wherein the process parameters comprise: the temperature in the first zone was 255 ℃, the temperature in the second zone was 260 ℃, the temperature in the third zone was 260 ℃, the temperature in the fourth zone was 265 ℃, the temperature in the fifth zone was 265 ℃, the temperature in the sixth zone was 265 ℃, the temperature in the seventh zone was 265 ℃, the temperature in the eighth zone was 260 ℃, the temperature in the die head was 260 ℃ and the screw speed was 300 rpm.
The shape of a screw of the parallel double-screw extruder is a single thread, the ratio L/D of the length L and the diameter D of the screw is 35, and the screw is provided with 2 meshing block areas and 1 reverse thread area.
Example 4:
the polyphenylene ether/high impact polystyrene composition of the embodiment is prepared from the following raw materials in parts by weight:
48 parts of high-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.48dL/g),
38 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
14 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 100 ℃ for 4 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 rpm) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the side direction (the fourth zone) of the parallel double-screw extruder (total eight zones) for melt extrusion and granulation, wherein the process parameters comprise: the temperature in the first zone was 265 deg.C, the temperature in the second zone was 270 deg.C, the temperature in the third zone was 270 deg.C, the temperature in the fourth zone was 275 deg.C, the temperature in the fifth zone was 275 deg.C, the temperature in the sixth zone was 275 deg.C, the temperature in the seventh zone was 275 deg.C, the temperature in the eighth zone was 270 deg.C, the temperature in the die head was 270 deg.C, and the screw speed was 500 rpm.
The screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 45, and the screw is provided with 2 meshing block areas and 1 reverse-thread area.
Example 5:
the polyphenylene ether/high impact polystyrene composition of the embodiment is prepared from the following raw materials in parts by weight:
39 parts of high-viscosity polyphenyl ether resin (the intrinsic viscosity is 0.48dL/g),
29 parts of low-viscosity polyphenylene ether resin (with the intrinsic viscosity of 0.35dL/g),
32 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 95 ℃ for 5 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 rpm) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the side direction (the fourth zone) of the parallel double-screw extruder (total eight zones) for melt extrusion and granulation, wherein the process parameters comprise: the temperature in the first zone was 260 ℃, the temperature in the second zone was 265 ℃, the temperature in the third zone was 265 ℃, the temperature in the fourth zone was 270 ℃, the temperature in the fifth zone was 270 ℃, the temperature in the sixth zone was 270 ℃, the temperature in the seventh zone was 270 ℃, the temperature in the eighth zone was 265 ℃, the temperature in the die head was 265 ℃ and the screw speed was 400 rpm.
The screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 40, and the screw is provided with 2 meshing block areas and 1 back-thread area.
Example 6:
the polyphenylene ether/high impact polystyrene composition of the embodiment is prepared from the following raw materials in parts by weight:
46 parts of high-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.48dL/g),
36 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
18 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 95 ℃ for 5 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 rpm) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the side direction (the fourth zone) of the parallel double-screw extruder (total eight zones) for melt extrusion and granulation, wherein the process parameters comprise: the temperature of the first zone was 260 ℃, the temperature of the second zone was 265 ℃, the temperature of the third zone was 265 ℃, the temperature of the fourth zone was 270 ℃, the temperature of the fifth zone was 270 ℃, the temperature of the sixth zone was 270 ℃, the temperature of the seventh zone was 270 ℃, the temperature of the eighth zone was 265 ℃, the temperature of the die head was 265 ℃ and the screw speed was 400 rpm.
The screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 40, and the screw is provided with 2 meshing block areas and 1 back-thread area.
Example 7:
the polyphenylene oxide/high impact polystyrene composition of the embodiment is prepared from the following raw materials in parts by weight:
43 parts of high-viscosity polyphenylene ether resin (intrinsic viscosity 0.48dL/g),
32 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
25 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 95 ℃ for 5 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 rpm) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the side direction (the fourth zone) of the parallel double-screw extruder (total eight zones) for melt extrusion and granulation, wherein the process parameters comprise: the temperature in the first zone was 260 ℃, the temperature in the second zone was 265 ℃, the temperature in the third zone was 265 ℃, the temperature in the fourth zone was 270 ℃, the temperature in the fifth zone was 270 ℃, the temperature in the sixth zone was 270 ℃, the temperature in the seventh zone was 270 ℃, the temperature in the eighth zone was 265 ℃, the temperature in the die head was 265 ℃ and the screw speed was 400 rpm.
The screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 40, and the screw is provided with 2 meshing block areas and 1 back-thread area.
Example 8:
the polyphenylene ether/high impact polystyrene composition of the embodiment is prepared from the following raw materials in parts by weight:
43 parts of high-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.48dL/g),
32 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
25 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 95 ℃ for 5 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the side direction (the fourth zone) of the parallel double-screw extruder (total eight zones) for melt extrusion and granulation, wherein the process parameters comprise: the temperature in the first zone was 260 ℃, the temperature in the second zone was 265 ℃, the temperature in the third zone was 265 ℃, the temperature in the fourth zone was 270 ℃, the temperature in the fifth zone was 270 ℃, the temperature in the sixth zone was 270 ℃, the temperature in the seventh zone was 270 ℃, the temperature in the eighth zone was 265 ℃, the temperature in the die head was 265 ℃ and the screw speed was 400 rpm.
The shape of a screw of the parallel double-screw extruder is double-thread, the ratio L/D of the length L and the diameter D of the screw is 50, and the screw is provided with 2 meshing block areas and 1 back-thread area.
Comparative example 1:
the comparative example is a polyphenyl ether/high impact polystyrene composition, which is prepared from the following raw materials in parts by weight:
43 parts of high-viscosity polyphenylene ether resin (with the intrinsic viscosity of 0.55dL/g),
32 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
25 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 95 ℃ for 5 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the parallel double-screw extruder (totally eight zones) in the lateral direction (fourth zone) for melt extrusion, and granulating, wherein the process parameters comprise: the temperature of the first zone was 260 ℃, the temperature of the second zone was 265 ℃, the temperature of the third zone was 265 ℃, the temperature of the fourth zone was 270 ℃, the temperature of the fifth zone was 270 ℃, the temperature of the sixth zone was 270 ℃, the temperature of the seventh zone was 270 ℃, the temperature of the eighth zone was 265 ℃, the temperature of the die head was 265 ℃ and the screw speed was 400 rpm.
The screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 40, and the screw is provided with 2 meshing block areas and 1 back-thread area.
Comparative example 2:
the comparative example is a polyphenyl ether/high impact polystyrene composition, which is prepared from the following raw materials in parts by weight:
43 parts of high-viscosity polyphenylene ether resin (intrinsic viscosity 0.48dL/g),
32 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.28dL/g),
25 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 95 ℃ for 5 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 rpm) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the parallel double-screw extruder (totally eight zones) in the lateral direction (fourth zone) for melt extrusion, and granulating, wherein the process parameters comprise: the temperature in the first zone was 260 ℃, the temperature in the second zone was 265 ℃, the temperature in the third zone was 265 ℃, the temperature in the fourth zone was 270 ℃, the temperature in the fifth zone was 270 ℃, the temperature in the sixth zone was 270 ℃, the temperature in the seventh zone was 270 ℃, the temperature in the eighth zone was 265 ℃, the temperature in the die head was 265 ℃ and the screw speed was 400 rpm.
The screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 40, and the screw is provided with 2 meshing block areas and 1 back-thread area.
Comparative example 3:
the polyphenylene oxide/high impact polystyrene composition is prepared from the following raw materials in parts by weight:
43 parts of high-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.48dL/g),
32 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
25 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
0.2 portion of N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide,
0.2 part of bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate,
0.2 part of pentaerythritol zinc.
The preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 95 ℃ for 5 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder for melt extrusion and granulation, wherein the process parameters comprise: the temperature of the first zone was 260 ℃, the temperature of the second zone was 265 ℃, the temperature of the third zone was 265 ℃, the temperature of the fourth zone was 270 ℃, the temperature of the fifth zone was 270 ℃, the temperature of the sixth zone was 270 ℃, the temperature of the seventh zone was 270 ℃, the temperature of the eighth zone was 265 ℃, the temperature of the die head was 265 ℃ and the screw speed was 400 rpm.
The screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 40, and the screw is provided with 2 meshing block areas and 1 back-thread area.
Comparative example 4:
the comparative example is a polyphenyl ether/high impact polystyrene composition, which is prepared from the following raw materials in parts by weight:
43 parts of high-viscosity polyphenylene ether resin (intrinsic viscosity 0.48dL/g),
32 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
25 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 95 ℃ for 5 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-butadiene-styrene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the side direction (the fourth zone) of the parallel double-screw extruder (total eight zones) for melt extrusion and granulation, wherein the process parameters comprise: the temperature in the first zone was 260 ℃, the temperature in the second zone was 265 ℃, the temperature in the third zone was 265 ℃, the temperature in the fourth zone was 270 ℃, the temperature in the fifth zone was 270 ℃, the temperature in the sixth zone was 270 ℃, the temperature in the seventh zone was 270 ℃, the temperature in the eighth zone was 265 ℃, the temperature in the die head was 265 ℃ and the screw speed was 400 rpm.
The parallel double-screw extruder is characterized in that a screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 40, and the screw is provided with 2 meshing block areas and 1 reverse-thread area.
Comparative example 5:
the polyphenylene oxide/high impact polystyrene composition is prepared from the following raw materials in parts by weight:
43 parts of high-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.48dL/g),
32 parts of low-viscosity polyphenylene ether resin (the intrinsic viscosity is 0.35dL/g),
25 parts of high impact polystyrene resin (23000 in number average molecular weight),
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 95 ℃ for 5 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a high-speed stirrer (the rotating speed is 1000 revolutions per minute) for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer and the hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another high-speed stirrer (the rotating speed is 1000 rpm) for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the side direction (the fourth zone) of the parallel double-screw extruder (total eight zones) for melt extrusion and granulation, wherein the process parameters comprise: the temperature in the first zone was 260 ℃, the temperature in the second zone was 265 ℃, the temperature in the third zone was 265 ℃, the temperature in the fourth zone was 270 ℃, the temperature in the fifth zone was 270 ℃, the temperature in the sixth zone was 270 ℃, the temperature in the seventh zone was 270 ℃, the temperature in the eighth zone was 265 ℃, the temperature in the die head was 265 ℃ and the screw speed was 400 rpm.
The screw of the parallel double-screw extruder is in a single-thread shape, the ratio L/D of the length L and the diameter D of the screw is 40, and the screw is provided with 2 meshing block areas and 1 back-thread area.
The following is a list of raw material compositions of examples and comparative examples (table 1).
TABLE 1 summary of the composition parts by weight of the raw materials of the examples and comparative examples
Remarking: a, changing a screw structure; b, the intrinsic viscosity of the high-viscosity PPO is 0.55 dL/g; c, the intrinsic viscosity of the low-viscosity PPO is 0.28 dL/g; and d, replacing SEPS-g-MAH with SEBS-g-MAH.
The amounts of N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc used in the above examples and comparative examples were 0.2 parts.
The polyphenylene ether/high impact polystyrene compositions prepared in the above examples and comparative examples were subjected to the following property tests:
tensile property: testing according to GB/T1040-2006 standard, wherein the stretching speed is 50 mm/min;
impact property: according to the test of GB/T1843-2008 standard, the thickness of the sample strip is 4 mm;
melt index: testing according to GB/T3682-;
the results of the performance tests are shown in table 2.
TABLE 2 Properties of polyphenylene ether/high impact polystyrene compositions of examples and comparative examples
In examples 1 to 7, the addition amounts of the high-viscosity polyphenylene ether resin, the low-viscosity polyphenylene ether resin, the high-impact polystyrene resin, SG, TDI and SEPS-g-MAH were adjusted, and it can be seen from the table that as the addition amount of the high-impact polystyrene resin was decreased (or the addition amount of the polyphenylene ether resin was increased), the tensile strength exhibited an increasing trend of change, while the notched impact strength and melt index exhibited a decreasing trend of change, primarily because the HIPS base resin was lower in strength and better in toughness and flowability, and SG and SEPS-g-MAH can improve the compatibility between the polyphenyl ether resin and the high impact polystyrene resin, thereby improving the mechanical property of the polyphenyl ether/high impact polystyrene composition, but the strength of SG and SEPS-g-MAH is lower, too much addition thereof adversely affects the mechanical properties of the polyphenylene ether/high impact polystyrene composition. Meanwhile, TDI can reduce the generation of polyphenyl ether resin oligomer, and the mechanical property of the polyphenyl ether/high impact polystyrene composition is ensured by the addition of TDI. By comparison, the overall performance of example 7 is best.
Example 7 in comparison with example 8, the parallel twin-screw extruder of example 8 was a twin-screw extruder having a screw shape with a ratio L/D of the length L of the screw to the diameter D of 50, and the parallel twin-screw extruder of example 7 was a single-screw extruder having a screw shape with a ratio L/D of the length L of the screw to the diameter D of 40, and it was found by comparison that the tensile strength, notched impact strength and melt index of the polyphenylene ether/high impact polystyrene composition prepared using the screw parameters of the parallel twin-screw extruder described in example 7 were better.
Compared with the comparative example 1, the high-viscosity polyphenylene ether resin with the intrinsic viscosity of 0.55dL/g is used in the comparative example 1, the high-viscosity polyphenylene ether resin with the intrinsic viscosity of 0.48dL/g is used in the example 7, the fluidity of the high-viscosity polyphenylene ether resin is greatly reduced along with the increase of the intrinsic viscosity of the polyphenylene ether resin, and when the intrinsic viscosity of the polyphenylene ether resin is 0.55dL/g, the melt index of the polyphenylene ether/high-impact polystyrene composition is only 6.1g/10min, and the processability is poor; example 7 in comparison with comparative example 2, comparative example 2 used a low-tack polyphenylene ether resin having an intrinsic viscosity of 0.28dL/g, whereas example 7 used a low-tack polyphenylene ether resin having an intrinsic viscosity of 0.35dL/g, and as the intrinsic viscosity of the polyphenylene ether resin decreased, the tensile strength and notched impact strength decreased, and the polyphenylene ether/high impact polystyrene composition prepared in comparative example 2 had lower tensile strength and notched impact strength than those of example 7; example 7 in comparison with comparative example 3, comparative example 3 has no addition of SG, TDI and SEPS-g-MAH, and has a general compatibility of PPO and HIPS, so that the prepared polyphenylene ether/high impact polystyrene composition has lower tensile strength and notched impact strength than those of example 7; example 7 in comparison to comparative example 4, comparative example 4 was an SEBS-g-MAH, whereas example 7 was an SEPS-g-MAH, and the polyphenylene ether/high impact polystyrene composition prepared in example 7 had higher tensile and notched impact strengths than comparative example 4; example 7 in comparison to comparative example 5, the PPO/HIPS composition produced polyphenylene ether resin oligomers to affect mechanical properties due to the absence of the addition of toluene diisocyanate in comparative example 5, resulting in polyphenylene ether/high impact polystyrene compositions prepared in comparative example 5 having lower tensile strength and notched impact strength than those of example 7.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The polyphenyl ether/high impact polystyrene composition is characterized by being prepared from the following raw materials in parts by weight:
40-46 parts of high-viscosity polyphenyl ether resin,
30-36 parts of low-viscosity polyphenyl ether resin,
18-30 parts of high impact polystyrene resin,
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
the intrinsic viscosity of the high-viscosity polyphenyl ether resin is 0.45-0.51 dL/g; the intrinsic viscosity of the low-viscosity polyphenyl ether resin is 0.33-0.37 dL/g; the number average molecular weight of the high impact polystyrene resin is 17000-28000;
the preparation method of the polyphenyl ether/high impact polystyrene composition comprises the following steps:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 80-110 ℃ for 4-8 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a stirrer for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another stirrer for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the parallel double-screw extruder in the lateral direction, performing melt extrusion, and granulating, wherein the process parameters comprise: the temperature of the first zone is 250-270 ℃, the temperature of the second zone is 255-275 ℃, the temperature of the third zone is 255-275 ℃, the temperature of the fourth zone is 260-280 ℃, the temperature of the fifth zone is 260-280 ℃, the temperature of the sixth zone is 260-280 ℃, the temperature of the seventh zone is 260-280 ℃, the temperature of the eighth zone is 255-275 ℃, the temperature of the die head is 255-275 ℃ and the rotation speed of the screw is 200-600 rpm;
the shape of the screw of the parallel double-screw extruder is a single thread; the ratio L/D of the length L of the screw to the diameter D of the screw is 35 to 50; the screw is provided with more than 1 meshing block area and more than 1 reverse thread area.
2. The polyphenylene ether/high impact polystyrene composition of claim 1, which is prepared from the following raw materials in parts by weight:
41-45 parts of high-viscosity polyphenyl ether resin,
30-34 parts of low-viscosity polyphenyl ether resin,
22-28 parts of high impact polystyrene resin,
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
3. the polyphenylene ether/high impact polystyrene composition of claim 2, which is prepared from the following raw materials in parts by weight:
43 parts of high-viscosity polyphenyl ether resin,
32 parts of low-viscosity polyphenyl ether resin,
25 parts of high impact polystyrene resin,
the sum of the parts by weight of the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high impact polystyrene resin is 100 parts,
4. the polyphenylene ether/high impact polystyrene composition according to any one of claims 1 to 3, wherein the mass fraction of glycidyl methacrylate in the copolymer of styrene and glycidyl methacrylate is 2 to 4 wt%.
5. The polyphenylene ether/high impact polystyrene composition according to any one of claims 1 to 3, wherein the maleic anhydride graft ratio in the hydrogenated styrene-isoprene copolymer grafted maleic anhydride is 0.8 to 1.5 wt%.
6. A method for preparing the polyphenylene ether/high impact polystyrene composition of any one of claims 1 to 5, comprising the steps of:
(1) drying the high-viscosity polyphenyl ether resin, the low-viscosity polyphenyl ether resin and the high-impact polystyrene resin at the temperature of 80-110 ℃ for 4-8 hours, cooling, and adding the cooled high-viscosity polyphenyl ether resin, the cooled low-viscosity polyphenyl ether resin, the cooled high-impact polystyrene resin, the N, N' -bis (2,2,6, 6-tetramethyl-4-piperidyl) -1, 3-benzenedicarboxamide, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and pentaerythritol zinc into a stirrer for mixing;
(2) adding the styrene-glycidyl methacrylate copolymer, toluene diisocyanate and hydrogenated styrene-isoprene copolymer grafted maleic anhydride into another stirrer for mixing;
(3) adding the mixture mixed in the step (1) into a parallel double-screw extruder through a feeder, adding the mixture mixed in the step (2) into the parallel double-screw extruder in the lateral direction, performing melt extrusion, and granulating, wherein the process parameters comprise: the temperature of the first zone is 250-270 ℃, the temperature of the second zone is 255-275 ℃, the temperature of the third zone is 255-275 ℃, the temperature of the fourth zone is 260-280 ℃, the temperature of the fifth zone is 260-280 ℃, the temperature of the sixth zone is 260-280 ℃, the temperature of the seventh zone is 260-280 ℃, the temperature of the eighth zone is 255-275 ℃, the temperature of the die head is 255-275 ℃ and the rotation speed of the screw is 200-600 rpm;
the screw shape of the parallel double-screw extruder is a single thread; the ratio L/D of the length L of the screw to the diameter D of the screw is 35 to 50; the screw is provided with more than 1 meshing block area and more than 1 reverse thread area.
7. The preparation method according to claim 6, wherein in the step (1), the high-viscosity polyphenylene ether resin, the low-viscosity polyphenylene ether resin and the high-impact polystyrene resin are dried at a temperature of 90 to 100 ℃ for 4 to 6 hours; the process parameters in the step (3) comprise: the temperature of the first zone is 255-265 ℃, the temperature of the second zone is 260-270 ℃, the temperature of the third zone is 260-270 ℃, the temperature of the fourth zone is 265-275 ℃, the temperature of the fifth zone is 265-275 ℃, the temperature of the sixth zone is 265-275 ℃, the temperature of the seventh zone is 265-275 ℃, the temperature of the eighth zone is 260-270 ℃, the temperature of the die head is 260-270 ℃, and the rotating speed of the screw is 300-500 rpm.
8. The method according to claim 6, wherein the ratio L/D of the screw length L to the diameter D is 35 to 45; and 2 meshing block areas and 1 reverse thread area are arranged on the screw rod.
9. The method according to claim 6 or 7, wherein in step (1) and/or step (2), the stirrer is a high-speed stirrer with a rotation speed of 500 and 1500 rpm.
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| CN108026365A (en) * | 2015-08-20 | 2018-05-11 | 沙特基础工业全球技术公司 | Resin combination for high-frequency electronic component |
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| JPH069749A (en) * | 1992-06-26 | 1994-01-18 | Sumitomo Chem Co Ltd | Resin composition |
| CN108026365A (en) * | 2015-08-20 | 2018-05-11 | 沙特基础工业全球技术公司 | Resin combination for high-frequency electronic component |
| CN106867245A (en) * | 2015-12-09 | 2017-06-20 | 旭化成株式会社 | The manufacture method of thermoplastic resin composition, products formed and products formed |
| CN106316790A (en) * | 2016-08-18 | 2017-01-11 | 河源市鑫达科技有限公司 | Process for synthesizing zinc pentaerythritol in heat stabilizer |
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