CN104559109A - Polycarbonate heat-conducting composite material and preparation method thereof - Google Patents

Polycarbonate heat-conducting composite material and preparation method thereof Download PDF

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CN104559109A
CN104559109A CN201410837169.2A CN201410837169A CN104559109A CN 104559109 A CN104559109 A CN 104559109A CN 201410837169 A CN201410837169 A CN 201410837169A CN 104559109 A CN104559109 A CN 104559109A
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polycarbonate
heat
composite material
master batch
heat conduction
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CN104559109B (en
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李红刚
马述伟
祁博
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Dongguan Honour Ep Ltd
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Dongguan Honour Ep Ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00Making granules
    • B29B9/02Making granules by dividing preformed material
    • B29B9/06Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/92Measuring, controlling or regulating
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00Processes of treating or compounding macromolecular substances
    • C08J3/20Compounding polymers with additives, e.g. colouring
    • C08J3/22Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2369/00Characterised by the use of polycarbonates; Derivatives of polycarbonates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2425/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2425/02Homopolymers or copolymers of hydrocarbons
    • C08J2425/04Homopolymers or copolymers of styrene
    • C08J2425/14Homopolymers or copolymers of styrene with unsaturated esters
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2435/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Derivatives of such polymers
    • C08J2435/06Copolymers with vinyl aromatic monomers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2451/00Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2451/06Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2469/00Characterised by the use of polycarbonates; Derivatives of polycarbonates
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00Specific properties of additives
    • C08K2201/002Physical properties
    • C08K2201/003Additives being defined by their diameter
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00Specific properties of additives
    • C08K2201/002Physical properties
    • C08K2201/004Additives being defined by their length

Abstract

The invention provides a polycarbonate heat-conducting composite material and a preparation method thereof. The composite material comprises components in parts by weight as follows: 100 parts of polycarbonate, 40-70 parts of heat-conducting masterbatch, 10-30 parts of glass fibers, 0.2-0.8 parts of a main antioxidant, 0.3-1.2 parts of an auxiliary antioxidant and 0.5-2.0 parts of a lubricant, wherein the heat-conducting masterbatch comprises components in parts by weight as follows: 30 parts of porous polycarbonate powder, 10-20 parts of carbon black, 5-20 parts of graphene, 5-10 parts of carbon nano-tubes and 5-15 parts of a compatilizer. The preparation method comprises steps as follows: A, preparation of the heat-conducting masterbatch; B, machining of the heat-conducting composite material: the polycarbonate, the heat-conducting masterbatch obtained in Step A, the main antioxidant, the auxiliary antioxidant and the lubricant are mixed in a high-speed mixer, the glass fibers are laterally fed through accurate calibration and extruded by a twin-screw extruder for granulation, and the polycarbonate heat-conducting composite material with higher heat conductivity is prepared.

Description

A kind of polycarbonate heat-conductive composite material and preparation method thereof
Technical field
The present invention relates to modified composite material preparation field, be specifically related to the present invention relates to a kind of polycarbonate heat-conductive composite material and preparation method thereof.
Background technology
Polycarbonate (PC) is the engineering plastics that a kind of over-all properties is superior, also be the general engineering plastic that rate of growth is the fastest in recent years, there is the advantages such as excellent impelling strength, electric insulating quality, creep resistant, the transparency and nontoxicity, be widely used in the aspects such as the shell of automobile, sports equipment, office equipment etc. and electronic apparatus component at present.Often with metal insert that is fixing, heat radiation in the parts of more above-mentioned application apparatuss, but the molding shrinkage difference of PC and metal is large, like this in injection moulding process owing to easily there is stress cracking in shrinking percentage difference, or shaping after plastic in remaining large stress and ftractureing in subsequent technique, so condemnation factor is high, with high costs; Simultaneously, along with developing rapidly of electronic apparatus industry, unicircuit just towards miniaturization, high-density, powerful future development, now the heat of equipment accumulating rapidly, temperature also in continuous rising, and temperature has fatal impact to stabilization of equipment performance and work-ing life.Based on above-mentioned 2 points, just require that PC material has the performance characteristics such as low-stress, low-thermal-expansion, high thermoconductivity and height are heat-resisting, to improve shaping yield and to ensure that microelectronic circuit dispels the heat in time, prevent warpage, stripping or seminess and affect performance and the life-span of product.Therefore, if on the basis keeping the original premium properties of PC material, improve its stress cracking and increase substantially its thermal conductivity, for meeting, the Application Areas of market to the demand of this material and expansion PC material is significant.
At present, relating to conduction powder such as adopting metal oxide has a lot to the patented technology that PC carries out blending and modifying, such as Chinese patent CN 101418116A, CN 104004328A, CN 103289342A etc., but the thermal conductivity of metal oxide is low, addition is very large, and the metal oxide meeting catalyzed oxidation PC of the overwhelming majority, the performance of PC is reduced very serious, almost there is no practical value, so also there is no the PC thermally conductive material with practical value of volume production on the market; This patent adopts special dispersing method, makes heat-conducting medium addition few; By fiberglass reinforced, release internal stress, be also conducive to the foundation of heat conduction network simultaneously; Not only thermal conductivity is high but also mechanical strength large for obtained heat conduction PC, does not also have patent to have the fine glass fiber reinforced PC thermally conductive material of carbon of high thermal conductivity and excellent mechanical performances at present simultaneously.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of polycarbonate heat-conductive composite material is provided, it has low-stress, higher thermal conductivity, this material has the characteristics such as rigidity is high, good stability of the dimension, antifatigue simultaneously, can be widely used in apparatus casing, electronic component, switchboard, power tool cover etc.
Another object of the present invention is to provide the preparation method of polycarbonate heat-conductive composite material
Realized by following scheme:
A kind of polycarbonate heat-conductive composite material, comprises polycarbonate, heat conduction master batch, oxidation inhibitor and lubricant, it is characterized in that: the parts by weight of each component are:
Heat conduction master batch, comprises following component, and the parts by weight of each component are:
Described polycarbonate heat-conductive composite material, the preferred weight number of each component is:
Heat conduction master batch, each component preferred weight number is:
Described polycarbonate heat-conductive composite material, the more preferably parts by weight of each component are:
Heat conduction master batch, each component more preferably parts by weight is:
Described polycarbonate is injection grade polycarbonate, and preferred molten index is the polycarbonate resin of 10 ~ 20g/10min (300 DEG C, 1.2k g, ASTM D1238), mobility and mechanical property moderate.
Described glass fibre is alkali-free chopped glass fiber, filament diameter 7 ~ 13, chopped length 3 ~ 24.
Described primary antioxidant is any one of antioxidant 1076 or antioxidant 1010, described auxiliary anti-oxidant be in irgasfos 168, oxidation inhibitor 626, oxidation inhibitor PEPQ and oxidation inhibitor 412S any one and more than.
Described lubricant be pentaerythritol stearate, A Kema L-1000 and polymer wax any one and more than.Pentaerythritol stearate class belongs to internal lubricant for polycarbonate, it plays the effect of the interaction force weakened between molecular chain, intermolecular slip and rotation can be caused, lower intermolecular frictional force, avoid too much shearing force generation thermal conductance to cause material to degrade, the mobility of material can be improved simultaneously; A Kema L-1000 or polymer wax belong to external lubricant for polycarbonate, and it can be attached to the surface of melt or processor, mould, form lubrication interface, reduce the frictional force of melt and processor, can improve processing characteristics.
Described compatilizer is styrene-acrylonitrile-glycidyl methacrylate copolymer, styrene-acrylonitrile-copolymer-maleic anhydride, POE grafted maleic anhydride and POE graft glycidyl methacrylate any one and more than.
A kind of preparation method of polycarbonate heat-conductive composite material, comprise: the preparation of A, heat conduction master batch: a, by Graphene and carbon nanotube precise in proportion, make the dispersion of Graphene and even carbon nanotube by blast air dispersion method, be adsorbed onto on dispersible carrier carbon black, obtained heat-conducting medium; B, vesicular polycarbonate powder, heat-conducting medium and compatilizer to be weighed by certain proportion speed, be fed in high-speed mixer and fully mix, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; The processing of B, heat-conductive composite material: by pure polycarbonate powder dry 4h at 110 DEG C, then the heat conduction master batch, primary antioxidant, auxiliary anti-oxidant and the lubricant that polycarbonate, step A are obtained weigh by certain proportion speed by agent, fully mix in high-speed mixer, glass fibre passes through side feeding through accurate calibration, through twin screw extruder extruding pelletization, obtain polycarbonate heat-conductive composite material of the present invention, extrusion temperature is 250 ~ 280 DEG C.
A kind of polycarbonate heat-conductive composite material, comprises polycarbonate, heat conduction master batch, oxidation inhibitor and lubricant, it is characterized in that: the parts by weight of each component are:
Heat conduction master batch, with weight parts, comprises following component:
Described polycarbonate heat-conductive composite material, the preferred weight number of each component is:
Heat conduction master batch, each component preferred weight number is:
Described polycarbonate heat-conductive composite material, the more preferably parts by weight of each component are:
Heat conduction master batch, each component more preferably parts by weight is:
Described polycarbonate is injection grade polycarbonate, and described glass fibre is alkali-free chopped glass fiber, filament diameter 7 ~ 13, chopped length 3 ~ 24.
Described primary antioxidant is any one of antioxidant 1076 or antioxidant 1010, described auxiliary anti-oxidant be in irgasfos 168, oxidation inhibitor 626, oxidation inhibitor PEPQ and oxidation inhibitor 412S any one and more than.
Described lubricant be pentaerythritol stearate, A Kema L-1000 and polymer wax any one and more than.
Described compatilizer is styrene-acrylonitrile-glycidyl methacrylate copolymer, styrene-acrylonitrile-copolymer-maleic anhydride, POE grafted maleic anhydride and POE graft glycidyl methacrylate any one and more than.
A kind of preparation method of polycarbonate heat-conductive composite material, comprise: the preparation of A, heat conduction master batch: a, by Graphene and carbon nanotube precise in proportion, make the dispersion of Graphene and even carbon nanotube by blast air dispersion method, be adsorbed onto on dispersible carrier carbon black, obtained heat-conducting medium; B, vesicular polycarbonate powder, heat-conducting medium and compatilizer to be weighed by certain proportion speed, be fed in high-speed mixer and fully mix, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; The processing of B, heat-conductive composite material: by pure polycarbonate powder dry 4h at 110 DEG C, then the heat conduction master batch, primary antioxidant, auxiliary anti-oxidant and the lubricant that polycarbonate, step A are obtained weigh by certain proportion speed by agent, fully mix in high-speed mixer, heat conduction carbon fiber passes through side feeding through accurate calibration, through twin screw extruder extruding pelletization, obtain polycarbonate heat-conductive composite material of the present invention, extrusion temperature is 250 ~ 280 DEG C.
The invention has the advantages that:
1, utilize and there is the Graphene of high thermal conductivity and carbon nanotube binary combination for heat-conducting medium and construct fine and close thermally conductive pathways, possess good heat conductivility to make matrix material;
2, the present invention adopts primary antioxidant and auxiliary anti-oxidant to combine, and improves the stability of material in preparation process;
3, lubricant of the present invention be pentaerythritol stearate, A Kema L-1000, polymer wax any one or two kinds of; Pentaerythritol stearate class belongs to internal lubricant for polycarbonate, it plays the effect of the interaction force weakened between molecular chain, intermolecular slip and rotation can be caused, lower intermolecular frictional force, avoid too much shearing force generation thermal conductance to cause material to degrade, the mobility of material can be improved simultaneously; A Kema L-1000 or polymer wax belong to external lubricant for polycarbonate, and it can be attached to the surface of melt or processor, mould, form lubrication interface, reduce the frictional force of melt and processor, can improve processing characteristics;
4, present invention employs blast air dispersion method, this simple, effective dispersing method can make two kinds of heat conductive fillers disperse fully; Have employed carbon black is dispersible carrier simultaneously, its energy active adsorption heat conductive filler, thus prevents heat conductive filler from reassembling; The heat conductive filler that have employed two kinds of different structures carries out composite, has well filled up the space in thermally conductive pathways thus optimizes the heat conduction network in matrix material, PC matrix material is possessed good thermal conductivity.
Embodiment
The further detailed description the present invention of following examples, but the present invention is not limited to this embodiment.
Embodiment 1
A kind of preparation method of polycarbonate heat-conductive composite material, the preparation of A, heat conduction master batch: a, take 200g Graphene, 50g carbon nanotube, 200g carbon black, 150g styrene-acrylonitrile-copolymer-maleic anhydride and 300g vesicular polycarbonate powder, make the dispersion of 200g Graphene and 50g even carbon nanotube by blast air dispersion method, be adsorbed onto on the dispersible carrier-carbon black of 200g, obtained 450g heat-conducting medium; B, 300g vesicular polycarbonate powder, 450g heat-conducting medium and compatilizer 150g styrene-acrylonitrile-copolymer-maleic anhydride be fed in high-speed mixer fully mix, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; The processing of B, heat-conductive composite material: by pure polycarbonate powder dry 4h at 110 DEG C, then the 900g heat conduction master batch that obtains of precise 2250g polycarbonate, step A and 4.5g primary antioxidant 1076,6.75g auxiliary anti-oxidant 168 and 11.25g lubricant pentaerythritol stearate, above raw material is dropped in high-speed mixer and fully mixes, 225g glass fibre is by side feeding, through twin screw extruder extruding pelletization, obtain the polycarbonate heat-conductive composite material of embodiment 1, extrusion temperature is 250 ~ 280 DEG C.
Embodiment 2
A kind of preparation method of polycarbonate heat-conductive composite material, the preparation of A, heat conduction master batch: a, take 200g Graphene, 70g carbon nanotube, 200g carbon black, 100g styrene-acrylonitrile-glycidyl methacrylate copolymer and 300g vesicular polycarbonate powder, make the dispersion of 200g Graphene and 70g even carbon nanotube by blast air dispersion method, be adsorbed onto on the dispersible carrier-carbon black of 200g, obtained 470g heat-conducting medium; B, 300g vesicular polycarbonate powder, 470g heat-conducting medium and compatilizer 100g styrene-acrylonitrile-glycidyl methacrylate be fed in high-speed mixer fully mix, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; The processing of B, heat-conductive composite material: by pure polycarbonate powder dry 4h at 110 DEG C, then the 870g heat conduction master batch that obtains of precise 1740g polycarbonate, step A and 6.96g primary antioxidant 1010,10.44g auxiliary anti-oxidant PEPQ and 8.7g lubricant A Kema L-1000, above raw material is dropped in high-speed mixer and fully mixes, 261g glass fibre is by side feeding, through twin screw extruder extruding pelletization, obtain the polycarbonate heat-conductive composite material of embodiment 2, extrusion temperature is 250 ~ 280 DEG C.
Embodiment 3
A kind of preparation method of polycarbonate heat-conductive composite material, the preparation of A, heat conduction master batch: a, take 150g Graphene, 70g carbon nanotube, 150g carbon black, 100g POE grafted maleic anhydride and 300g vesicular polycarbonate powder, make the dispersion of 150g Graphene and 70g even carbon nanotube by blast air dispersion method, be adsorbed onto on the dispersible carrier-carbon black of 150g, obtained 370g heat-conducting medium; B, 300g vesicular polycarbonate powder, 370g heat-conducting medium and compatilizer 100g POE grafted maleic anhydride be fed in high-speed mixer fully mix, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; The processing of B, heat-conductive composite material: by pure polycarbonate powder dry 4h at 110 DEG C, then the 770g heat conduction master batch that obtains of precise 1283g polycarbonate, step A and 7.7g primary antioxidant 1010,10.25g auxiliary anti-oxidant 412S and 12.8g lubricant A Kema L-1000, above raw material is dropped in high-speed mixer and fully mixes, 257g glass fibre is by side feeding, through twin screw extruder extruding pelletization, obtain the polycarbonate heat-conductive composite material of embodiment 3, extrusion temperature is 250 ~ 280 DEG C.
Embodiment 4
A kind of preparation method of polycarbonate heat-conductive composite material, the preparation of A, heat conduction master batch: a, take 50g Graphene, 100g carbon nanotube, 100g carbon black, 50g POE graft glycidyl methacrylate and 300g vesicular polycarbonate powder, make the dispersion of 50g Graphene and 100g even carbon nanotube by blast air dispersion method, be adsorbed onto on the dispersible carrier-carbon black of 100g, obtained 250g heat-conducting medium; B, 300g vesicular polycarbonate powder, 250g heat-conducting medium and compatilizer 50gPOE graft glycidyl methacrylate be fed in high-speed mixer fully mix, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; The processing of B, heat-conductive composite material: by pure polycarbonate powder dry 4h at 110 DEG C, then the 600g heat conduction master batch that obtains of precise 857.1g polycarbonate, step A and 6.86g primary antioxidant 1010,8.57g auxiliary anti-oxidant PEPQ and 12.86g lubricant A Kema L-1000, above raw material is dropped in high-speed mixer and fully mixes, 214.3g glass fibre is by side feeding, through twin screw extruder extruding pelletization, obtain the polycarbonate heat-conductive composite material of embodiment 4, extrusion temperature is 250 ~ 280 DEG C.
Embodiment 5
A kind of preparation method of polycarbonate heat-conductive composite material, the preparation of A, heat conduction master batch: a, take 100g Graphene, 100g carbon nanotube, 100g carbon black, 50g styrene-acrylonitrile-glycidyl methacrylate copolymer and 300g vesicular polycarbonate powder, make the dispersion of 100g Graphene and 100g even carbon nanotube by blast air dispersion method, be adsorbed onto on the dispersible carrier-carbon black of 100g, obtained 300g heat-conducting medium; B, 300g vesicular polycarbonate powder, 300g heat-conducting medium and compatilizer 50g styrene-acrylonitrile-glycidyl methacrylate entered fully mix to high-speed mixer, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; Prepared by B, heat-conductive composite material: by pure polycarbonate powder dry 4h at 110 DEG C, then the 650g heat conduction master batch that obtains of precise 928.6g polycarbonate, step A and 7.43g primary antioxidant 1076,11.14g auxiliary anti-oxidant PEPQ and 18.57g lubricant polymer wax, above raw material is dropped in high-speed mixer and fully mixes, 278.6g glass fibre is by side feeding, through twin screw extruder extruding pelletization, obtain the polycarbonate heat-conductive composite material of embodiment 5, extrusion temperature is 250 ~ 280 DEG C.
Table 1 is shown as follows for each composition weight number of comparative example 1-5, and preparation method is as embodiment 1-5.
Embodiment 6
A kind of preparation method of polycarbonate heat-conductive composite material, the preparation of A, heat conduction master batch: a, take 200g Graphene, 50g carbon nanotube, 200g carbon black, 150g styrene-acrylonitrile-copolymer-maleic anhydride and 300g vesicular polycarbonate powder, make the dispersion of 200g Graphene and 50g even carbon nanotube by blast air dispersion method, be adsorbed onto on the dispersible carrier-carbon black of 200g, obtained 450g heat-conducting medium; B, 300g vesicular polycarbonate powder, 450g heat-conducting medium and compatilizer 150g styrene-acrylonitrile-copolymer-maleic anhydride be fed in high-speed mixer fully mix, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; Prepared by B, heat-conductive composite material: by pure polycarbonate powder dry 4h at 110 DEG C, then the 900g heat conduction master batch that obtains of precise 2250g polycarbonate, step A and 4.5g primary antioxidant 1076,6.75g auxiliary anti-oxidant 168 and 11.25g lubricant pentaerythritol stearate, above raw material is dropped in high-speed mixer and fully mixes, 225g heat conductivity carbon fiber is by side feeding, through twin screw extruder extruding pelletization, obtain the polycarbonate heat-conductive composite material of embodiment 6, extrusion temperature is 250 ~ 280 DEG C.
Table two is: each component of embodiment 6-10 and comparative example 6-10 and parts by weight thereof are: (embodiment 7-10 is identical with embodiment 6 with the preparation method of comparative example 6-10, does not wherein have in embodiment 10 not adopt blast air dispersion method in the preparation process of heat conduction master batch but directly mixes)
Each thermally conductive material for above preparation carries out performance test, and result is as follows:
The performance synopsis of the polycarbonate heat-conductive composite material that table 3 is prepared for embodiment 1-5 and comparative example 1-5
The performance synopsis of the polycarbonate heat-conductive composite material that table 4 is prepared for embodiment 6-10 and comparative example 6-10
Shown by above data, the material that the heat-conductive composite material of polycarbonate prepared by embodiments of the invention 1-5 and glass fibre is prepared than comparative example 1-5 has obvious advantage in heat conductivility, and heat-conductive composite material prepared by embodiment 1-5 is with the obvious advantage in flexural strength, tensile strength, heat-drawn wire is higher and melting index is higher, has outstanding advantage in the composite.
The heat-conductive composite material of the polycarbonate that the heat-conductive composite material of polycarbonate prepared by embodiments of the invention 6-10 and heat conduction carbon fiber is prepared than comparative example 6-10 and heat conduction carbon fiber also has obvious advantage in heat conductivility, and heat-conductive composite material prepared by embodiment 6-10 is with the obvious advantage in flexural strength, tensile strength, heat-drawn wire is higher and melting index is higher, has outstanding advantage in the composite.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from spirit of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (10)

1. a polycarbonate heat-conductive composite material, comprises polycarbonate, heat conduction master batch, oxidation inhibitor and lubricant, it is characterized in that: the parts by weight of each component are:
Polycarbonate 100;
Heat conduction master batch 40-70;
Glass fibre 10-30;
Primary antioxidant 0.2-0.8;
Auxiliary anti-oxidant 0.3-1.2;
Lubricant 0.5-2.0;
Described heat conduction master batch, comprises following component, and the parts by weight of each component are:
Porous polycarbonate powder 30;
Carbon black 10-20;
Graphene 5-20;
Carbon nanotube 5-10;
Compatilizer 5-15.
2. polycarbonate heat-conductive composite material according to claim 1, is characterized in that: the parts by weight of each component are:
Polycarbonate 100;
Heat conduction master batch 50-70;
Glass fibre 15-25;
Primary antioxidant 0.2-0.8;
Auxiliary anti-oxidant 0.3-1.2;
Lubricant 0.5-2.0;
Heat conduction master batch, comprises following component, and the parts by weight of each component are:
Porous polycarbonate powder 30;
Carbon black 10-20;
Graphene 10-20;
Carbon nanotube 5-8;
Compatilizer 5-12.
3. polycarbonate heat-conductive composite material according to claim 1, is characterized in that: the parts by weight of each component are:
Polycarbonate 100;
Heat conduction master batch 60;
Glass fibre 20;
Primary antioxidant 0.5;
Auxiliary anti-oxidant 0.8;
Lubricant 1.5;
Heat conduction master batch, comprises following component, and the parts by weight of each component are:
Porous polycarbonate powder 30;
Carbon black 15;
Graphene 15;
Carbon nanotube 7;
Compatilizer 8.
4. polycarbonate heat-conductive composite material according to claim 1, is characterized in that: described polycarbonate is injection grade polycarbonate, and described glass fibre is for being alkali-free chopped glass fiber, filament diameter 7 ~ 13, chopped length 3 ~ 24.
5. polycarbonate heat-conductive composite material according to claim 1, it is characterized in that: described primary antioxidant is any one of antioxidant 1076 or antioxidant 1010, described auxiliary anti-oxidant be in irgasfos 168, oxidation inhibitor 626, oxidation inhibitor PEPQ and oxidation inhibitor 412S any one and more than.
6. polycarbonate heat-conductive composite material according to claim 1, is characterized in that: described lubricant be pentaerythritol stearate, A Kema L-1000 and polymer wax any one and more than.
7. polycarbonate heat-conductive composite material according to claim 1, it is characterized in that: described compatilizer is styrene-acrylonitrile-glycidyl methacrylate copolymer, styrene-acrylonitrile-copolymer-maleic anhydride, POE grafted maleic anhydride and POE graft glycidyl methacrylate any one and more than.
8. the preparation method of a polycarbonate heat-conductive composite material, comprise: the preparation of A, heat conduction master batch: a, by Graphene and carbon nanotube precise in proportion, make the dispersion of Graphene and even carbon nanotube by blast air dispersion method, be adsorbed onto on dispersible carrier carbon black, obtained heat-conducting medium; B, vesicular polycarbonate powder, heat-conducting medium and compatilizer to be weighed by certain proportion speed, be fed in high-speed mixer and fully mix, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; The processing of B, heat-conductive composite material: by pure polycarbonate powder dry 4 h at 110 DEG C, then the heat conduction master batch, primary antioxidant, auxiliary anti-oxidant and the lubricant that polycarbonate, step A are obtained weigh by certain proportion speed, fully mix in high-speed mixer, glass fibre passes through side feeding through accurate calibration, through twin screw extruder extruding pelletization, obtain matrix material, extrusion temperature is 250 ~ 280 DEG C.
9. a polycarbonate heat-conductive composite material, comprises polycarbonate, heat conduction master batch, oxidation inhibitor and lubricant, it is characterized in that: the parts by weight of each component are:
Polycarbonate 100
Heat conduction master batch 40-70
Heat conductivity carbon fiber 10-30
Primary antioxidant 0.2-0.8
Auxiliary anti-oxidant 0.3-1.2
Lubricant 0.5-2.0
Heat conduction master batch, comprises following component, and the parts by weight of each component are:
Porous polycarbonate powder 30
Carbon black 10-20
Graphene 5-20
Carbon nanotube 5-10
Compatilizer 5-15.
10. the preparation method of a polycarbonate heat-conductive composite material, comprise: the preparation of A, heat conduction master batch: a, by Graphene and carbon nanotube precise in proportion, make the dispersion of Graphene and even carbon nanotube by blast air dispersion method, be adsorbed onto on dispersible carrier carbon black, obtained heat-conducting medium; B, vesicular polycarbonate powder, heat-conducting medium and compatilizer to be weighed by certain proportion speed, be fed in high-speed mixer and fully mix, then through twin screw extruder extruding pelletization, obtain heat conduction master batch, twin screw extruder each district temperature is 230 ~ 260 DEG C; The processing of B, heat-conductive composite material: by pure polycarbonate powder dry 4 h at 110 DEG C, then the heat conduction master batch, primary antioxidant, auxiliary anti-oxidant and the lubricant that polycarbonate, step A are obtained weigh by certain proportion speed, fully mix in high-speed mixer, heat conduction carbon fiber passes through side feeding through accurate calibration, through twin screw extruder extruding pelletization, obtain matrix material, extrusion temperature is 250 ~ 280 DEG C.
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