CN113025039A - Polyphenylene sulfide composite material and preparation method thereof - Google Patents
Polyphenylene sulfide composite material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a polyphenylene sulfide modified composite material applied to high-efficiency heat conduction and stable size and a preparation method thereof, belonging to the field of plastic modification. The modified composite material is composed of polyphenylene sulfide, reinforced fibers, reinforced minerals, a compatilizer, a flexibilizer, a stabilizer, a nucleating agent, a lubricant and a coupling agent. The high-rigidity high-heat-conductivity polyphenylene sulfide composite material with stable performance is prepared by utilizing the good fluidity of polyphenylene sulfide, adding reinforcing fibers and minerals and assisting with auxiliaries and carrying out blending, melting and modifying. The polyphenylene sulfide modified composite material prepared by the invention has the thermal conductivity coefficient as high as 10W/M.K, simultaneously has extremely high rigidity, good strength and toughness, excellent dimensional stability and creep resistance, and excellent hydrolysis resistance and chemical corrosion resistance, and can be widely applied to the fields of electronic and electric products, aerospace and chemical processing.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a polyphenylene sulfide composite material and a preparation method thereof.
Background
Polyphenylene Sulfide (PPS), Polyphenylene sulfide and Polyphenylene sulfide, and the molecular main chain is semi-crystalline thermoplastic special engineering plastic of thiophenyl. The high-temperature-resistant flame-retardant plastic has the outstanding characteristics of high temperature resistance, corrosion resistance, creep resistance, natural flame retardance, excellent electrical property and mechanical property, and is mainly applied to the fields of automobile manufacturing, electronic appliances, household appliances, machining, environmental protection engineering and aerospace. And the temperature of a lot of application environments is relatively high, in order to prolong the service life of parts, the environment temperature must be reduced as much as possible by cooling and heat dissipation, and the higher the thermal conductivity of a workpiece is, the better the heat dissipation effect is. Compared with metal materials and partial semiconductor materials with high thermal conductivity, the polyphenylene sulfide resin has low thermal conductivity, and the application field of the polyphenylene sulfide resin is limited to a great extent. However, polyphenylene sulfide has the advantages of low density, corrosion resistance, high specific strength, low cost, easy molding and the like, and the polyphenylene sulfide modified composite material with high thermal conductivity is developed to meet the requirements of market application. The invention is based on the idea of high molecular polymer-carbon composite material, and simultaneously, nano-scale and submicron-scale semiconductor powder material is added to improve the melt viscosity, crystallization temperature and the like of the composition, thereby improving the processing performance of the product formed in later period.
The development of the high polymer composite modified material with high heat conductivity and excellent comprehensive mechanical properties has very important significance for lightening the workpiece, improving the processing efficiency of the workpiece, reducing the production and manufacturing cost of the workpiece and optimizing and innovating the shape and size design of the workpiece. The polyphenylene sulfide resin has good temperature resistance, the glass transition temperature is 90 ℃, the load thermal deformation temperature is about 110 ℃, the melting point is 281 ℃, after the enhancement modification by glass fiber and the like, the load thermal deformation temperature can be improved to 260 ℃, the 1 percent weight loss in the air is as high as 440-450 ℃, and under the nitrogen protection atmosphere, the mass loss is almost not generated below 500 ℃. Therefore, the polyphenylene sulfide modified composite material is suitable for a working environment with higher temperature, and under larger temperature change, the product of the invention has excellent rigidity, and can keep good dimensional stability and high-temperature creep resistance of a product. The limit oxygen index of the polyphenylene sulfide resin is as high as 56%, and the flame retardance of the polyphenylene sulfide resin with the thickness of 0.8mm can reach UL 94V 0 level. The water-soluble polyurethane resin is insoluble in any solvent at the temperature of below 175 ℃, and has excellent hydrolysis resistance, alcoholysis resistance and chemical resistance.
The Chinese patent document CN200810025884.0 utilizes zinc sulfide as a heat-conducting filler to prepare the antistatic heat-conducting polyphenylene sulfide composite material, has a good antistatic effect, has a heat-conducting coefficient not exceeding 1W/m.K, and does not have a good heat-radiating and heat-conducting effect; the Chinese patent document CN 102558864A adopts a heat-conducting agent NP325, a coupling agent, a toughening agent, a grafting modifier, a stabilizer and other auxiliary agents to prepare a polyphenylene sulfide composite material with a heat-conducting coefficient of 11.2W/m.K, and the material has relatively low strength and rigidity and cannot meet the use of high-load parts; the Chinese patent document CN 103012913A adopts molybdenum disulfide, a coupling agent, a processing aid and the like to prepare the polyphenylene sulfide composite material, but the material has poor mechanical properties and low heat conductivity coefficient, and the use of the material is influenced; the Chinese patent document CN 105199379A adopts a continuous long carbon fiber reinforced thermoplastic resin matrix nano composite material to prepare the automobile hub, but the use of nano powder and heat conduction auxiliary agent materials in the material system is not beneficial to the application of the automobile hub, and is not beneficial to improving the mechanical property of the material system; the Chinese patent document CN 108165010A adopts boron nitride as a heat conduction auxiliary agent to prepare a composite modified material by compounding glass fiber reinforced polyphenylene sulfide resin, has certain strength, but has lower heat conduction coefficient, and is not suitable for application working conditions with higher heat exchange requirements; the chinese patent document CN 106977922 a adopts the heat-conducting master batch to compound the carbon nanotube reinforced polyphenylene sulfide resin to prepare the high heat-conducting composite material, the heat-conducting coefficient can reach 8.8W/m · K, the bending strength and modulus are low, the dimensional stability is poor, and the application environment with large load or high requirement for dimensional accuracy cannot be satisfied.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the invention provides the high-rigidity high-heat-conductivity polyphenylene sulfide composite material which has excellent strength and rigidity and good high-low temperature impact resistance, and a processed product of the composite material has extremely high dimensional stability and high-temperature creep resistance, and is suitable for the working conditions of high-temperature and low-temperature circulation and good acid resistance, alkali resistance and corrosion resistance of other chemical solvents.
In order to achieve the above object, the invention adopts the following technical scheme:
the invention provides a heat-conducting and electric-conducting polyphenylene sulfide composite material, which comprises the following components in percentage by mass: 20-60% of polyphenylene sulfide, 10-25% of reinforced fiber, 20-50% of reinforced mineral, 0.5-5.0% of compatilizer, 1.0-10.0% of flexibilizer and 0.5-10.0% of other auxiliary agents. The reinforced fiber and the reinforced mineral are added at different sections through the side feeding of the double-screw extruder equipment, so that the reinforced fiber and the reinforced mineral are uniformly distributed and dispersed in a modified composite material system, and the modified composite material has the characteristics of excellent fiber particle size dispersion, uniform powder distribution, multiple heat conduction overlapping points, high heat conductivity coefficient, strong electric conductivity, excellent material mechanical property and excellent processing performance. The PPS modified composite material has the process requirements of multiple injection molding, mould pressing or extrusion molding, and the processing mode has simple process, high production efficiency and strong continuous industrial production capacity.
The melt flow rate of the polyphenylene sulfide resin is 100-5000 g/10min under the conditions of 315.6 ℃ and 5 Kg. Linear PPS resins having a weight average molecular weight of greater than 21000 are preferred.
The reinforced fiber is one or more blends of alkali-free glass fiber, carbon fiber, Kevlar fiber, polyester fiber and polypropylene fiber. Carbonized polyacrylonitrile fibers chopped by 3-10mm are preferred.
The reinforced mineral is one or more of graphite powder, graphene, heat-conducting carbon black, silicon carbide, silicon nitride, boron nitride, aluminum nitride, titanium nitride, aluminum oxide, magnesium oxide and molybdenum disulfide. Preferably, a mixture of graphene and heat conducting graphite is selected, and the ratio is 1: 4-1: 1. The graphene is characterized by a sheet structure, the microscopic thickness of the graphene is less than 100 nanometers, the microscopic size of the graphene is 20-200 nanometers, and the macroscopic size of the graphene is 0.5-2.5 millimeters. The heat conducting graphite is characterized in that the heat conductivity is more than 0.9, the content of fixed carbon is more than 99.95 percent, the content of iron is less than 30PPM, and the D50 is more than 18.0 microns. As a comparative example, the silicon carbide is characterized as beta silicon carbide with a purity of 99.5% or more, an iron content of not more than 0.3%, and a D50 of not more than 3.5 μm.
The compatilizer is vinyl-glycidyl methacrylate, vinyl-acrylate-glycidyl methacrylate, glycidyl methacrylate and glycidyl acrylate; vinyl acetate, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, styrene-butadiene-styrene copolymers, hydrogenated styrene-butadiene-styrene copolymers, ethylene-octene copolymers, and maleic anhydride grafts thereof. Preferably vinyl-acrylate-glycidyl methacrylate, characterized in that the glycidyl methacrylate content is more than 8%.
The toughening agent is one or a mixture of more of PA6, PA66, PC, PBT, PET and PES. Preferably PA66, characterized by a viscosity of about 2.8 to 3.2Pa · S
The other auxiliary agents are used for improving the mechanical property, the service performance and the processing performance of the high-rigidity high-heat-conductivity polyphenylene sulfide composite material and are one or a combination of an antioxidant, a coupling agent, a lubricant and a nucleating agent.
The invention also provides a preparation method of the polyphenylene sulfide composite material, which comprises the following steps:
(1) and (3) enhancing mineral pretreatment: uniformly mixing a silane coupling agent, pure water and ethanol according to the volume ratio of 2:1:7, soaking the preferable enhanced mineral graphene and the heat conduction graphite into the solution respectively, carrying out ultrasonic treatment for 3-4 hours, filtering and drying the enhanced mineral respectively for later use.
(2) Weighing the following materials in parts by mass: 20-60% of polyphenylene sulfide, 0.5-5.0% of compatilizer, 1.0-10.0% of flexibilizer and 0.5-10.0% of other auxiliary agents. And adding the weighed materials into a high-speed mixer, mixing at a low speed of 200rpm for 2 minutes, pausing for 1 minute, then mixing at a high speed of 1500rpm for 2 minutes, standing for dust, taking out, and adding the dust through a main feeding hopper of a double-screw extruder.
(3) Weighing the following materials in parts by mass: 10-20% of graphene and 20-30% of heat conducting graphite, adding the weighed materials into a high-speed mixer, mixing at a low speed of 200rpm for 2 minutes, standing the mixture for dust, taking out the mixture, and adding the mixture through a first side feeding hopper of a double-screw extruder.
(4) The reinforcing fibers are added through a second side feeding hopper of the double-screw extruder.
(5) The outer diameter of a screw of the double-screw extruder equipment is 25-75 mm, the length-diameter ratio is 36-48 Ds, and the specific torque is larger than 11 N.m. Preferably, the external diameter of a screw of the double-screw extruder equipment is 35 mm, the length-diameter ratio is 44Ds, and the specific torque is 11.5 N.m. The technological parameters are set as the screw rotation speed of 200-600 rpm, the processing temperature of 260-335 ℃, the residence time of 1.5-3 minutes and the mouth mold pressure of 2-18 MPa, and the materials are subjected to melt extrusion and hot granulation, or bracing, cooling, granulating, drying and packaging.
Detailed Description
The present invention is further illustrated by the following specific examples, but the scope of the present invention is not limited to the following examples.
Example 1
A high-rigidity high-thermal-conductivity polyphenylene sulfide modified composite material comprises 44.0% of PPS resin, 20.0% of chopped carbon fibers, 15.0% of graphene, 15% of thermal-conductivity graphite, 1.5% of compatilizer, 3.0% of flexibilizer and 1.5% of processing aid. The chopped carbon fiber is carbonized polyacrylonitrile fiber with the length of 6.0 mm, and the 1.5% of processing aid comprises 0.5% of antioxidant, 0.2% of lubricant, 0.5% of titanate coupling agent and 0.3% of nucleating agent. The materials are respectively added into a feeding hopper of a double-screw extruder, and are subjected to melt blending and extrusion granulation to form the modified composite material. The processing technology comprises the following steps: first zone temperature of the twin-screw extruder: 260 ℃ and a second zone: 295 ℃, three zones: 315 ℃ and four zones: 320 ℃ and five zones: 320 ℃ and six zones: 310 ℃ and seven regions: 300 ℃ and eight regions: 300 ℃ and nine zones: 290 ℃, ten zones: 285 ℃ and the temperature of a neck ring die is 300 ℃; the screw speed was 300 rpm.
Example 2
The high-rigidity high-heat-conductivity polyphenylene sulfide modified composite material comprises 44.0% of PPS resin, 20.0% of chopped carbon fibers, 10.0% of graphene, 20% of heat-conductivity graphite, 1.5% of compatilizer, 3.0% of flexibilizer and 1.5% of processing aid. The chopped carbon fiber is carbonized polyacrylonitrile fiber with the length of 6.0 mm, and the 1.5% of processing aid comprises 0.5% of antioxidant, 0.2% of lubricant, 0.5% of titanate coupling agent and 0.3% of nucleating agent. The materials are respectively added into a feeding hopper of a double-screw extruder, and are subjected to melt blending and extrusion granulation to form the modified composite material. The processing technology comprises the following steps: first zone temperature of the twin-screw extruder: 260 ℃ and a second zone: 295 ℃, three zones: 315 ℃ and four zones: 320 ℃ and five zones: 320 ℃ and six zones: 310 ℃ and seven regions: 300 ℃ and eight regions: 300 ℃ and nine zones: 290 ℃, ten zones: 285 ℃ and the temperature of a neck ring die is 300 ℃; the screw speed was 350 rpm.
Example 3
The high-rigidity high-heat-conductivity polyphenylene sulfide modified composite material comprises 39.0% of PPS resin, 20.0% of chopped carbon fibers, 15.0% of graphene, 20% of heat-conductivity graphite, 1.5% of compatilizer, 3.0% of flexibilizer and 1.5% of processing aid. The chopped carbon fiber is carbonized polyacrylonitrile fiber with the length of 6.0 mm, and the 1.5% of processing aid comprises 0.5% of antioxidant, 0.2% of lubricant, 0.5% of titanate coupling agent and 0.3% of nucleating agent. The materials are respectively added into a feeding hopper of a double-screw extruder, and are subjected to melt blending and extrusion granulation to form the modified composite material. The processing technology comprises the following steps: first zone temperature of the twin-screw extruder: 260 ℃ and a second zone: 295 ℃, three zones: 315 ℃ and four zones: 325 ℃ and five zones: 320 ℃ and six zones: 310 ℃ and seven regions: 300 ℃ and eight regions: 300 ℃ and nine zones: 290 ℃, ten zones: 285 ℃ and the temperature of a neck ring die is 300 ℃; the screw speed was 300 rpm.
Example 4
A high-rigidity high-thermal-conductivity polyphenylene sulfide modified composite material comprises 34.0% of PPS resin, 15.0% of chopped carbon fibers, 15.0% of graphene, 30% of thermal-conductivity graphite, 1.5% of compatilizer, 3.0% of flexibilizer and 1.5% of processing aid. The chopped carbon fiber is carbonized polyacrylonitrile fiber with the length of 6.0 mm, and the 1.5% of processing aid comprises 0.5% of antioxidant, 0.2% of lubricant, 0.5% of titanate coupling agent and 0.3% of nucleating agent. The materials are respectively added into a feeding hopper of a double-screw extruder, and are subjected to melt blending and extrusion granulation to form the modified composite material. The processing technology comprises the following steps: first zone temperature of the twin-screw extruder: 260 ℃ and a second zone: 295 ℃, three zones: 320 ℃ and four zones: 325 ℃ and five zones: 320 ℃ and six zones: 310 ℃ and seven regions: 300 ℃ and eight regions: 300 ℃ and nine zones: 290 ℃, ten zones: 285 ℃ and the temperature of a neck ring die is 300 ℃; the screw speed was 300 rpm.
Example 5
The high-rigidity high-heat-conductivity polyphenylene sulfide modified composite material comprises 37.5% of PPS resin, 20.0% of chopped carbon fibers, 15.0% of graphene, 20% of heat-conductivity graphite, 3.0% of compatilizer, 3.0% of flexibilizer and 1.5% of processing aid. The chopped carbon fiber is carbonized polyacrylonitrile fiber with the length of 6.0 mm, and the 1.5% of processing aid comprises 0.5% of antioxidant, 0.2% of lubricant, 0.5% of titanate coupling agent and 0.3% of nucleating agent. The materials are respectively added into a feeding hopper of a double-screw extruder, and are subjected to melt blending and extrusion granulation to form the modified composite material. The processing technology comprises the following steps: first zone temperature of the twin-screw extruder: 260 ℃ and a second zone: 295 ℃, three zones: 315 ℃ and four zones: 325 ℃ and five zones: 320 ℃ and six zones: 310 ℃ and seven regions: 300 ℃ and eight regions: 300 ℃ and nine zones: 290 ℃, ten zones: 285 ℃ and the temperature of a neck ring die is 300 ℃; the screw speed was 300 rpm.
Example 6
A high-rigidity high-thermal-conductivity polyphenylene sulfide modified composite material comprises 34.0% of PPS resin, 20.0% of chopped carbon fibers, 15.0% of graphene, 30% of thermal-conductivity graphite, 1.5% of a compatilizer and 1.5% of a processing aid. The chopped carbon fiber is carbonized polyacrylonitrile fiber with the length of 6.0 mm, and the 1.5% of processing aid comprises 0.5% of antioxidant, 0.2% of lubricant, 0.5% of titanate coupling agent and 0.3% of nucleating agent. The materials are respectively added into a feeding hopper of a double-screw extruder, and are subjected to melt blending and extrusion granulation to form the modified composite material. The processing technology comprises the following steps: first zone temperature of the twin-screw extruder: 280 ℃ and a second zone: 300 ℃, three zones: 320 ℃ and four zones: 335 ℃ and five zones: 325 ℃ and six zones: 310 ℃ and seven regions: 300 ℃ and eight regions: 300 ℃ and nine zones: 290 ℃, ten zones: 285 ℃ and the neck mold temperature is 305 ℃; the screw speed was 300 rpm.
Example 7
The high-rigidity high-heat-conductivity polyphenylene sulfide modified composite material comprises 39.0% of PPS resin, 20.0% of chopped carbon fibers, 35% of beta silicon carbide, 1.5% of a compatilizer, 3.0% of a toughening agent and 1.5% of a processing aid. The chopped carbon fiber is carbonized polyacrylonitrile fiber with the length of 6.0 mm, and the 1.5% of processing aid comprises 0.5% of antioxidant, 0.2% of lubricant, 0.5% of titanate coupling agent and 0.3% of nucleating agent. The materials are respectively added into a feeding hopper of a double-screw extruder, and are subjected to melt blending and extrusion granulation to form the modified composite material. The processing technology comprises the following steps: first zone temperature of the twin-screw extruder: 260 ℃ and a second zone: 295 ℃, three zones: 315 ℃ and four zones: 325 ℃ and five zones: 320 ℃ and six zones: 310 ℃ and seven regions: 300 ℃ and eight regions: 300 ℃ and nine zones: 290 ℃, ten zones: 285 ℃ and the temperature of a neck ring die is 300 ℃; the screw speed was 300 rpm.
And (3) performance testing:
the tensile property of the high-rigidity high-thermal conductivity polyphenylene sulfide modified composite material prepared by the invention is tested according to the international standard ISO 527-1, 2; the flexural strength and flexural modulus thereof are tested according to international standard ISO 178; the impact strength of a cantilever beam notch is tested according to the international standard ISO 180; the heat conductivity coefficient is tested according to the international standard ISO 22007-2008; the surface resistivity thereof was measured according to the international electrical standard IEC 60093.
Examples 1 to 7, the mass fraction ratios of the formulations and the test performances thereof are shown in Table 1
TABLE 1
As can be seen from Table 1, the polyphenylene sulfide modified composite material with high rigidity and high thermal conductivity prepared by the technical scheme provided by the invention has extremely high rigidity, good strength and excellent thermal conductivity and electrical conductivity. The addition of carbon materials such as graphene and graphite powder can effectively improve the heat conductivity coefficient and surface resistivity of the composite material, and simultaneously improve the rigidity of the composite material to a great extent; the viscosity of the melt is greatly influenced by singly using the graphene material, and the mass fraction of the graphene material is more than 30 percent, so that the graphene material cannot be applied to a processing mode of melt blending, extrusion and granulation; the graphite material is singly used, when the mass fraction reaches 45%, the heat conductivity coefficient is about 4.6W/m.K, and the heat conductivity efficiency is poor; other thermally conductive materials such as boron nitride, which replace graphite materials at 45% mass fraction, have a thermal conductivity of about 3.8W/m-K, even less than the graphite material improvement. The carbon fiber reinforced material has similar strength, toughness and glass fiber reinforcing effect, and is superior in improving heat conduction efficiency. Meanwhile, the addition of the compatilizer and the toughening agent can effectively improve the notch impact strength of the composite material, thereby improving the toughness of the final product. Example 7 comparison shows that homogeneous silicon carbide and electrically conductive graphite, although having close thermal conductivities, have thermal conductivities in the modified composite system that are less than half that of the electrically conductive graphite and graphene composite system.
The polyphenylene sulfide composite material with high rigidity and high thermal conductivity and the preparation method thereof according to the present invention are described in detail above, the preparation principle and the production process of the present invention are specifically illustrated in the embodiments, and the description of the embodiments is provided to facilitate understanding and application of the present invention by those skilled in the art. Therefore, the present invention is not limited to the above-described embodiments, and the present invention extends to any novel combination or novel feature set forth in the description, and any improvements or modifications which do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The polyphenylene sulfide composite material is characterized by comprising polyphenylene sulfide, reinforcing fibers, reinforcing minerals, a compatilizer, a flexibilizer, a stabilizer, a nucleating agent, a lubricant and a coupling agent, and the polyphenylene sulfide composite material comprises the following components in percentage by mass:
2. the polyphenylene sulfide composite material as claimed in claim 1, wherein the melt flow rate of the polyphenylene sulfide resin is 100-5000 g/10min at 315.6 ℃ and 5 Kg.
3. The polyphenylene sulfide composite material as claimed in claim 1, wherein the reinforcing fiber is one or more blends of alkali-free glass fiber, carbon fiber, Kevlar fiber, polyester fiber, and polypropylene fiber.
4. The polyphenylene sulfide composite material as claimed in claim 1, wherein the reinforcing mineral is one or more blends of graphite powder, graphene, heat conductive carbon black, silicon carbide, silicon nitride, boron nitride, aluminum nitride, titanium nitride, aluminum oxide, magnesium oxide, and molybdenum disulfide.
5. The polyphenylene sulfide composite material of claim 1, wherein the compatibilizer is vinyl-glycidyl methacrylate, vinyl-acrylate-glycidyl methacrylate, glycidyl acrylate; vinyl acetate, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, styrene-butadiene-styrene copolymers, hydrogenated styrene-butadiene-styrene copolymers, ethylene-octene copolymers, and maleic anhydride grafts thereof.
6. The polyphenylene sulfide composite material as claimed in claim 1, wherein the toughening agent is one or more of PA6, PA66, PC, PBT, PET, PES.
7. The polyphenylene sulfide composite material according to claim 1, wherein the stabilizer is antioxidant of pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], N-octadecyl β - (4-hydroxyphenyl-3, 5-di-tert-butyl) propionate, N '-bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, 1, 3, 5-trimethyl-2, 4, 6-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) benzene, 2' -thiobis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]; 3, 9-bis (2, 4-di-tert-butylphenoxy) -2,4,8, 10-tetraoxo-3, 9-diphosphabicyclo [5.5] undecane, tris [ 2.4-di-tert-butylphenyl ] phosphite, bis (2, 4-di-tert-butylphenol) pentaerythritol diphosphite, dilauryl thiodipropionate, distearyl thiodipropionate.
8. The polyphenylene sulfide composite material as claimed in claim 1, wherein the nucleating agent is one or more of fumed silica, nano titanium dioxide, ultra-fine talc powder, alumina, titanium nitride, and boron nitride.
9. The polyphenylene sulfide composite material as claimed in claim 1, wherein the lubricant is one or more of fatty acid, alkali metal fatty acid salt, ethylene bis stearamide, low molecular weight polyethylene, silicone, pentaerythritol tetrastearate.
10. The polyphenylene sulfide composite material of claim 1, wherein the coupling agent is one or more of a silane coupling agent, a titanate coupling agent, and an aluminate coupling agent.
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| CN114456599A (en) * | 2022-04-13 | 2022-05-10 | 北京慕湖新材料技术有限公司 | Heat-conducting polyphenylene sulfide composite material and preparation method thereof |
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2020
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Application publication date: 20210625 |