CN111995854B - Polycarbonate composition and preparation method thereof - Google Patents
Polycarbonate composition and preparation method thereof Download PDFInfo
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- CN111995854B CN111995854B CN202010685716.5A CN202010685716A CN111995854B CN 111995854 B CN111995854 B CN 111995854B CN 202010685716 A CN202010685716 A CN 202010685716A CN 111995854 B CN111995854 B CN 111995854B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
- C08J5/08—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials glass fibres
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
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Abstract
The invention provides a polycarbonate composition, which is prepared from the following raw materials in parts by weight: 80-95 parts of polycarbonate, 5-20 parts of glass fiber filler and 1-5 parts of surface energy improver. According to the polycarbonate composition and the preparation method thereof, the glass fiber is subjected to ablation treatment, so that the surface tension of the glass fiber is greatly reduced, the bonding force between the glass fiber and resin is greatly reduced, the glass fiber and the resin can be effectively stripped when the glass fiber and the resin are subjected to impact force, the capability of absorbing the impact energy of the material is improved, and the actual impact strength of the material is effectively improved.
Description
Technical Field
The invention belongs to the technical field of engineering plastics, and particularly relates to a polycarbonate composition and a preparation method thereof.
Background
Polycarbonate (PC) is a common engineering plastic, has good material toughness, and is widely applied to the fields of automobiles, household appliances and the like. However, because an ester group structure exists in the middle of the polycarbonate molecule, the surface energy of the material is higher, dust and dirt in the air are easily adsorbed in the application process, so that the surface of the material is not resistant to dirt, and meanwhile, because the surface hardness is low, the appearance problems such as scratching and the like are easily caused in the wiping process.
At present, in the application of PC, the size stability and rigidity of the PC composition are mainly improved by adding fibrous fillers, but the general fibrous fillers can add some auxiliary agents to improve the agglomeration performance of glass fibers in the processing process, and the auxiliary agents can also improve the surface energy of the composition to a certain extent, so that the anti-fouling capability of the material is reduced.
Disclosure of Invention
In view of the above, the present invention provides a polycarbonate composition and a preparation method thereof, which aims to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a polycarbonate composition is prepared from the following raw materials in parts by weight:
80-95 parts of Polycarbonate (PC),
5-20 parts of glass fiber filler,
1-5 parts of a surface energy improver.
Preferably, the composition is prepared from the following raw materials in parts by weight:
80-95 parts of Polycarbonate (PC),
5-20 parts of glass fiber filler,
1-5 parts of a surface energy improver.
Further, the glass fiber filler is at least one of roving fiber, long glass fiber or short glass fiber; preferably, the glass fiber filler is at least one of M-glass, E-glass, A-glass, S-glass, R-glass or C-glass; preferably, the glass fiber filler is at least one of E-glass, A-glass or C-glass. The glass fiber filler may be surface-treated with a slurry and an adhesion promoter, may be partially surface-coated, or may be surface-treated without any treatment.
Further, the diameter of the glass fiber filler is 1-25um; preferably, the diameter of the glass fiber filler is 2-20um; preferably, the diameter of the glass fiber filler is 4-15um.
Further, the polycarbonate is at least one of aromatic polycarbonate, aliphatic polycarbonate, aromatic-aliphatic polycarbonate or branched polycarbonate; preferably, the polycarbonate is an aromatic polycarbonate.
Further, the viscosity average molecular weight of the polycarbonate is 13000-40000; preferably, the polycarbonate has a viscosity average molecular weight of from 16000 to 28000.
Further, the surface energy improver is a silicon-containing compound with the number-average molecular weight of 1000-50000 or a silicon-containing compound with the number-average molecular weight of 400000-2000000; the silicon-containing compound with the number average molecular weight of 1000-50000 is at least one of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil, methyl phenyl silicone oil, methyl chlorphenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoro propyl silicone oil, methyl vinyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen-containing silicone oil, hydroxyl hydrogen-containing silicone oil, cyanogen-containing silicone oil or oligomer thereof; the silicon-containing compound with the number average molecular weight of 400000-2000000 is polydimethylsiloxane.
Further, the polycarbonate composition also comprises other auxiliary agents, wherein the other auxiliary agents are at least one of heat stabilizers or antioxidants.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Firing the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the fired fibrous filler for later use;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) And respectively adding the premix and the fibrous filler into a double-screw extruder, wherein the double-screw extruder is provided with at least 1 vacuumizing part, introducing the melted material into a granulator through a water tank cooling port at the temperature of 10-50 ℃, homogenizing and granulating, and conveying the obtained particles through a sieve to remove moisture to obtain the polycarbonate composition.
The temperature of the burning step in the step (1) is 650 ℃, and the time is 20 minutes; the drying temperature in the step (1) is 120-130 ℃, and the drying time is 4-6 hours; the temperature of the double-screw extruder in the step (2) is 180-280 ℃; the vacuum pumping in the step (2) is positioned at least one of the tail end of the material conveying section, the front end of the melting section or the metering section.
The surface tension of the fibrous filler is greatly reduced by ablation of the fibrous filler, so that the bonding capacity of the fibrous filler and PC resin can be reduced, and when the fibrous filler is impacted by external force, the glass fiber and the resin glass are easy to absorb more impact energy, so that the impact strength of the material is improved; meanwhile, the surface tension of the glass fiber is reduced, so that the surface tension of the material is reduced, the anti-fouling capability of the material is improved, and the surface energy of the material is further reduced by adding the surface energy improver, so that the surface energy of the material is further reduced.
Compared with the prior art, the invention has the following advantages:
according to the polycarbonate composition and the preparation method thereof, the glass fiber is subjected to ablation treatment, so that the surface tension of the glass fiber is greatly reduced, the bonding force between the glass fiber and resin is greatly reduced, and the glass fiber and the resin can be effectively stripped when being subjected to impact force, so that the capability of absorbing impact energy of the material is improved, and the actual impact strength of the material is effectively improved; meanwhile, the surface tension of the glass fiber is reduced, so that the surface tension of the polycarbonate composition is reduced, and the anti-fouling capability of the material is improved; due to the fact that the silicon-containing compound has low surface energy, the silicon-containing compound with small molecular weight is easy to migrate to the surface of the composition to form a film-shaped barrier layer; according to a similar compatibility principle, the silicon-containing compound with large molecular weight can be enriched in the lower layer of the barrier film, so that a more lasting and effective barrier effect is achieved, and the surface energy of the composition is greatly reduced.
Detailed Description
Unless defined otherwise, technical terms used in the following examples have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs. The test reagents used in the following examples, unless otherwise specified, were all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.
The test standard or method of each performance in the embodiment of the invention is as follows:
method for testing surface tension of polycarbonate composition: the modified material is injection molded into a square plate with the thickness of 100mm x 2mm, and the surface tension of the material is tested in a surface contact angle mode, wherein the specific formula is gamma sv ＝γ sl +γ lv ×cosθ e ；
Tensile strength test method: ISO527;
test method of impact strength: ISO180, 23 ℃;
the test method of the multiple impact resistance comprises the following steps: adopting 2.75J, setting the impact height of a pendulum bob to be 49cm, then adopting repeated impact with N being more than 1 time, and recording the times of the sample strip being broken, wherein the more the times, the better the toughness;
the polycarbonate in the examples of the present invention was selected from 1300-10NP of LG in Korea; the glass fiber filler is made of Taishan mountain in Shandong (the embodiment adopts ablated glass fiber, and the comparative example adopts untreated glass fiber and burned glass fiber), and the diameter of the filler is 13 mu m; the silicon-containing compound A is O-SO9 of Guangzhou Huisii; the silicon-containing compound B is L5-4 of Vac.
The present invention will be described in detail with reference to examples.
Example 1
A polycarbonate composition is prepared from the following raw materials in parts by weight: 92 parts of polycarbonate, 5 parts of glass fiber, 0.6 part of silicon-containing compound A and 2.4 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) Respectively adding the premix and the fibrous filler into a double-screw extruder, wherein the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main machine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through a sieve for dehumidification to obtain the polycarbonate composition.
Example 2
A polycarbonate composition is prepared from the following raw materials in parts by weight: 87 parts of polycarbonate, 10 parts of glass fiber, 0.9 part of silicon-containing compound A and 2.1 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) Respectively adding the premix and the fibrous filler into a double-screw extruder, wherein the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main machine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through a sieve for dehumidification to obtain the polycarbonate composition.
Example 3
A polycarbonate composition is prepared from the following raw materials in parts by weight: 76 parts of polycarbonate, 20 parts of glass fiber, 1.2 parts of silicon-containing compound A and 2.8 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) Respectively adding the premix and the fibrous filler into a double-screw extruder, wherein the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main machine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through a sieve for dehumidification to obtain the polycarbonate composition.
Example 4
A polycarbonate composition is prepared from the following raw materials in parts by weight: 76 parts of polycarbonate, 10 parts of glass fiber, 1.6 parts of silicon-containing compound A and 2.4 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) Respectively adding the premix and the fibrous filler into a double-screw extruder, wherein the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main machine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through a sieve for dehumidification to obtain the polycarbonate composition.
Example 5
A polycarbonate composition is prepared from the following raw materials in parts by weight: 75 parts of polycarbonate, 20 parts of glass fiber, 1.5 parts of silicon-containing compound A and 3.5 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) The premix and the fibrous filler are respectively added into a double-screw extruder, the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main engine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing device, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through the sieving device for dehumidification to obtain the polycarbonate composition.
Example 6
A polycarbonate composition is prepared from the following raw materials in parts by weight: 73.8 parts of polycarbonate, 20 parts of glass fiber, 0.4 part of silicon-containing compound A and 1.6 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) The premix and the fibrous filler are respectively added into a double-screw extruder, the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main engine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing device, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through the sieving device for dehumidification to obtain the polycarbonate composition.
Comparative example 1
A polycarbonate composition is prepared from the following raw materials in parts by weight: 93 parts of polycarbonate, 5 parts of untreated glass fiber, 0.6 part of silicon-containing compound A and 2.4 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Pre-drying polycarbonate and fibrous filler for later use, wherein the drying temperature is 120 ℃, and the drying time is 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) Respectively adding the premix and the fibrous filler into a double-screw extruder, wherein the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main machine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through a sieve for dehumidification to obtain the polycarbonate composition.
Comparative example 2
A polycarbonate composition is prepared from the following raw materials in parts by weight: 93 parts of polycarbonate, 5 parts of burned glass fiber and 2 parts of a silicon-containing compound A.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) The premix and the fibrous filler are respectively added into a double-screw extruder, the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main engine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing device, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through the sieving device for dehumidification to obtain the polycarbonate composition.
Comparative example 3
A polycarbonate composition is prepared from the following raw materials in parts by weight: 84 parts of polycarbonate, 10 parts of burned glass fiber, 3 parts of a silicon-containing compound A and 3 parts of a silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) The premix and the fibrous filler are respectively added into a double-screw extruder, the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main engine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing device, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through the sieving device for dehumidification to obtain the polycarbonate composition.
Comparative example 4
A polycarbonate composition is prepared from the following raw materials in parts by weight: 86 parts of polycarbonate, 10 parts of burned glass fiber and 4 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) The premix and the fibrous filler are respectively added into a double-screw extruder, the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main engine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing device, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through the sieving device for dehumidification to obtain the polycarbonate composition.
Comparative example 5
A polycarbonate composition is prepared from the following raw materials in parts by weight: 75 parts of polycarbonate, 20 parts of burned glass fiber, 0.5 part of silicon-containing compound A and 4.5 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Burning the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the burned fibrous filler for later use, wherein the burning temperature is 650 ℃ for 20 minutes, and the drying temperature is 120 ℃ for 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) Respectively adding the premix and the fibrous filler into a double-screw extruder, wherein the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main machine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through a sieve for dehumidification to obtain the polycarbonate composition.
Comparative example 6
A polycarbonate composition is prepared from the following raw materials in parts by weight: 76 parts of polycarbonate, 20 parts of untreated glass fiber, 1.6 parts of silicon-containing compound A and 2.4 parts of silicon-containing compound B.
The preparation method of the polycarbonate composition comprises the following steps:
(1) Pre-drying polycarbonate and fibrous filler for later use, wherein the drying temperature is 120 ℃, and the drying time is 5 hours;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) Respectively adding the premix and the fibrous filler into a double-screw extruder, wherein the temperature of the double-screw extruder is 240 ℃ in a first zone, 245 ℃ in a second zone, 255 ℃ in a third zone, 255 ℃ in a fourth zone, 260 ℃ in a fifth zone, 240 ℃ in a sixth zone, 240 ℃ in a seventh zone, 245 ℃ in an eighth zone, 245 ℃ in a ninth zone, 260 ℃ in a tenth zone, the rotating speed of a main machine is 250-600 r/min, the double-screw extruder is provided with at least 1 vacuumizing, the melted material is introduced into a granulator through a water tank cooling port at 10-50 ℃ for homogenization and granulation, and the obtained particles are conveyed through a sieve for dehumidification to obtain the polycarbonate composition.
The results of testing the polycarbonate compositions obtained in examples 1 to 6 and comparative examples 1 to 6 are shown in tables 1 to 2.
TABLE 1 concrete compounding ratios (in parts by weight) of examples 1 to 6 and test performance results thereof
TABLE 2 concrete compounding ratio (parts by weight) of comparative examples 1 to 6 and test performance results thereof
From a comparison of the examples and comparative examples of table 1, it can be seen that: the invention is selected and used in the polycarbonate composition formula, through the pretreatment of the glass fiber and the addition of the surface energy treating agent, the impact resistance of the material is obviously improved, and the characteristic of rigidity-toughness balance of the PC material is exerted to a greater extent; meanwhile, the surface tension of the prepared material is greatly reduced, the anti-fouling capability of the material is greatly improved, and the applicability and the practicability of the material are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (13)
1. A polycarbonate composition characterized by: the composition is prepared from the following raw materials in parts by weight:
80-95 parts of Polycarbonate (PC),
5-20 parts of glass fiber filler,
3-5 parts of a surface energy improver;
the surface energy improver is a silicon-containing compound with the number-average molecular weight of 1000-50000 and a silicon-containing compound with the number-average molecular weight of 400000-2000000; the silicon-containing compound with the number average molecular weight of 1000-50000 is at least one of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil, methyl phenyl silicone oil, methyl chlorphenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoro propyl silicone oil, methyl vinyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen-containing silicone oil, hydroxyl hydrogen-containing silicone oil, cyanogen-containing silicone oil or oligomer thereof; the silicon-containing compound with the number-average molecular weight of 400000-2000000 is polydimethylsiloxane;
the preparation method of the polycarbonate composition comprises the following steps:
(1) Firing the fibrous filler, cooling to normal temperature, and pre-drying the polycarbonate and the fired fibrous filler for later use;
(2) Uniformly mixing the pre-dried polycarbonate and the surface energy improver to obtain a mixed premix, and then adding the fibrous filler in a side feeding manner;
(3) And respectively adding the premix and the fibrous filler into a double-screw extruder, wherein the double-screw extruder is provided with at least 1 vacuumizing part, introducing the melted material into a granulator through a water tank cooling port at the temperature of 10-50 ℃, homogenizing and granulating, and conveying the obtained particles through a sieve to remove moisture to obtain the polycarbonate composition.
2. The polycarbonate composition of claim 1, wherein: the glass fiber filler is at least one of roving fiber, long glass fiber or short glass fiber.
3. The polycarbonate composition of claim 2, wherein: the glass fiber filler is at least one of M-glass, E-glass, A-glass, S-glass, R-glass or C-glass.
4. The polycarbonate composition of claim 3, wherein: the glass fiber filler is at least one of E-glass, A-glass or C-glass.
5. The polycarbonate composition of claim 2, wherein: the diameter of the glass fiber filler is 1-25um.
6. The polycarbonate composition of claim 5, wherein: the diameter of the glass fiber filler is 2-20um.
7. The polycarbonate composition of claim 6, wherein: the diameter of the glass fiber filler is 4-15um.
8. The polycarbonate composition of claim 1, wherein: the polycarbonate is at least one of aromatic polycarbonate, aliphatic polycarbonate, aromatic-aliphatic polycarbonate or branched polycarbonate.
9. The polycarbonate composition of claim 8, wherein: the polycarbonate is aromatic polycarbonate.
10. The polycarbonate composition of claim 8, wherein: the viscosity average molecular weight of the polycarbonate is 13000-40000.
11. The polycarbonate composition of claim 10, wherein: the viscosity average molecular weight of the polycarbonate is from 16000 to 28000.
12. The polycarbonate composition of claim 1, wherein: the polycarbonate composition also comprises other auxiliary agents, wherein the other auxiliary agents are at least one of heat stabilizers or antioxidants.
13. The polycarbonate composition of claim 1, wherein: the temperature of the burning step in the step (1) is 650 ℃, and the time is 20 minutes; the drying temperature in the step (1) is 120-130 ℃, and the drying time is 4-6 hours; the temperature of the double-screw extruder in the step (2) is 180-280 ℃; the vacuum pumping in the step (2) is positioned at least one of the tail end of the material conveying section, the front end of the melting section or the metering section.
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| CN102382440A (en) * | 2011-05-31 | 2012-03-21 | 深圳市科聚新材料有限公司 | Glass fiber reinforced flame-retardant polycarbonate material and preparation method thereof |
| CN102604353A (en) * | 2012-02-21 | 2012-07-25 | 北京泰合源通生物科技有限公司 | Glass fiber reinforced polycarbonate composite material and preparation method thereof |
| CN104672850A (en) * | 2013-11-28 | 2015-06-03 | 上海杰事杰新材料(集团)股份有限公司 | Antistatic reinforced polycarbonate composite material and preparation method thereof |
| CN105131547A (en) * | 2015-08-28 | 2015-12-09 | 金发科技股份有限公司 | Polycarbonate composition and preparing method thereof |
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| US20060287422A1 (en) * | 2005-06-16 | 2006-12-21 | General Electric Company | Thermoplastic polycarbonate compositions with improved mechanical properties, articles made therefrom and method of manufacture |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102382440A (en) * | 2011-05-31 | 2012-03-21 | 深圳市科聚新材料有限公司 | Glass fiber reinforced flame-retardant polycarbonate material and preparation method thereof |
| CN102604353A (en) * | 2012-02-21 | 2012-07-25 | 北京泰合源通生物科技有限公司 | Glass fiber reinforced polycarbonate composite material and preparation method thereof |
| CN104672850A (en) * | 2013-11-28 | 2015-06-03 | 上海杰事杰新材料(集团)股份有限公司 | Antistatic reinforced polycarbonate composite material and preparation method thereof |
| CN105131547A (en) * | 2015-08-28 | 2015-12-09 | 金发科技股份有限公司 | Polycarbonate composition and preparing method thereof |
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