CN102174254A - Highly heat-conducting insulation engineering plastic and preparation method thereof - Google Patents
Highly heat-conducting insulation engineering plastic and preparation method thereof Download PDFInfo
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- CN102174254A CN102174254A CN2010106209455A CN201010620945A CN102174254A CN 102174254 A CN102174254 A CN 102174254A CN 2010106209455 A CN2010106209455 A CN 2010106209455A CN 201010620945 A CN201010620945 A CN 201010620945A CN 102174254 A CN102174254 A CN 102174254A
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Abstract
The invention discloses highly heat-conducting insulation engineering plastic, which consists of the following components in part by weight: 100 parts of plastic substrate, 100 to 900 parts of heat-conducting filler, 1 to 45 parts of compatibilizer, 1 to 90 parts of toughening agent, 1 to 45 parts of reinforcing agent, 1 to 36 parts of lubricating agent and 0.3 to 5.4 parts of antioxidant. The invention also discloses a preparation method of the engineering plastic, which comprises the following steps of: drying the plastic substrate and the heat-conducting filler in a 60 to 100 DEG C air dry oven for 4 to 8 hours; putting the components into a high-speed mixer and mixing for 3 to 5 minutes; performing internal mixing on the mixture in an internal mixer for 10 to 30 minutes; and uniformly grinding the mixture in a grinder, transferring to a charging hopper of a double-screw extruder, feeding fiber fillers through a fiber inlet of the double-screw extruder, melting, mixing, extruding, cooling, drying, and pelletizing. The prepared material has high heat-conducting property and mechanical property, and is easily subjected to injection molding.
Description
Technical field
The invention belongs to function of dominant field of polymer technology, particularly a kind of injection molding high heat conductive insulating engineering plastics of conducting heat and dispelling the heat of being used to.
Background technology
Traditional thermally conductive material mostly is heat conductivility preferred metal material, but metallic substance is because corrosion resistance difference and difficult processing, thereby has been difficult to satisfy the application requiring under some special conditionss.Because macromolecular material has superior corrosion resistance energy and mechanical property, thereby in some fields that can have higher requirements to material thermal conductivity, replace traditional metal materials just to seem extremely important with polymkeric substance as heat conducting base material, general macromolecular material heat conductivility is very poor, therefore must improve the heat conductivility of macromolecular material.
In the prior art, general prepare heat-conducting polymer material by the high heat conductive filler of filling in the presence of silane coupling agent, prepared thermally conductive material thermal conductivity is lower, and the mechanical property of material seriously descends owing to a large amount of addings of filler.
Summary of the invention
The high heat conductive insulating engineering plastics that the purpose of this invention is to provide a kind of thermal conductivity value height and processing characteristics excellence.
The technical solution adopted for the present invention to solve the technical problems is: a kind of high heat conductive insulating engineering plastics, including mass ratio is 1: the plastic substrate of 1-9 and heat conductive filler, described plastic substrate is a kind of in polymeric amide, polybutylene terephthalate, polyphenylene oxide resin, polyphenylene sulfide and the polycarbonate, and described thermally conductive material is one or more in aluminium nitride, silicon carbide, boron nitride, aluminium sesquioxide and the carbon fiber.
Further, also include expanding material, content is the 1-5% of heat conductive filler quality summation, and described expanding material is polypropylene grafted maleic anhydride, polycthylene grafted maleic anhydride, styrene-butadiene-styrene block copolymer grafted maleic anhydride, styrene-grafted maleic anhydride, one or more mixing wherein of styrene-ethylene-butylene-styrene segmented copolymer grafted maleic anhydride.
Further, also include toughner, content is the 1-10 of heat conductive filler quality summation, and described toughner is one or more mixing wherein of ethylene-vinyl acetate copolymer, ethylene-vinyl acetate copolymer grafted maleic anhydride, grafting maleic anhydride with ethylene propylene terpolymer, styrene-butadiene-styrene block copolymer grafted maleic anhydride, ethylene-octene copolymer grafted maleic anhydride.
Further, also include toughener, content is the 1-5% of heat conductive filler quality summation, and described toughener is one or more mixing wherein of glass fibre, carbon fiber, sapphire whisker, silicon carbide fiber, steel fiber.
Further, also include lubricant, content is the 1-4% of heat conductive filler quality summation, and described lubricant is one or more mixing wherein of stearic acid, Zinic stearas, polyethylene wax, polyamide wax.
Further; also include oxidation inhibitor; content is the 0.3-0.6% of heat conductive filler quality summation; described oxidation inhibitor is N; N '-two-(3-(3; the 5-di-tert-butyl-hydroxy phenyl) wherein one or more mixing of hexanediamine (oxidation inhibitor 1098), tricresyl phosphite (2, the 4-di-tert-butyl-phenyl) esters (oxidation inhibitor 168) propionyl).
Further, engineering plastics are made up of plastic substrate, heat conductive filler, expanding material, toughner, toughener, lubricant, oxidation inhibitor, and the weight fraction consumption of each component is as follows:
100 parts of plastic substrates
Heat conductive filler 100-900 part
Expanding material 1-45 part
Toughner 1-90 part
Toughener 1-45 part
Lubricant 1-36 part
Oxidation inhibitor 0.3-5.4 part.
Another object of the present invention provides a kind of preparation method of aforementioned high heat conductive insulating engineering plastics.
The technical solution adopted for the present invention to solve the technical problems is: a kind of preparation method of high heat conductive insulating engineering plastics, and step is as follows: a), will be according to the load weighted plastic substrate of weight proportion and heat conductive filler in 60-100 ℃ of air dry oven dry 4-8 hour; B), each component is put in the high-speed mixer and to be mixed 3-5 minute; C), with said mixture in Banbury mixer banburying 10-30 minute; D), said mixture is pulverized in Material disintegrator evenly, be transferred to the loading hopper of twin screw extruder then, the fiber-like filler entered from fine mouthful of adding of twin screw extruder, got final product through fusion-mixing-extrude-cool off-drying-pelletizing.
The present invention compared with prior art has following advantage:
One, adopting high heat-conducting ceramic powder and ceramic fiber compound system is heat conductive filler, increases the UNICOM of heat conduction network, improves the thermal conductivity of material.
Two, adopting modified by maleic acid anhydride graft polymkeric substance compound system is expanding material and toughner, increases the mechanical property of thermally conductive material.
Three, adopting ceramic fiber is toughener and heat conductive filler, increases the mechanical property and the heat conductivility of material.
Four, the technology that adopts mixing banburying earlier to melt extrude is again improved the compatible ability of each component of mixed system and the loading level of increase filler.
Five, product has high heat-conducting property and good processing properties, is easy to injection molding.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment one
Composition of raw materials (gram)
Polyphenylene sulfide 500
Aluminium nitride 400
Silicon carbide fiber 100
Styrene-grafted maleic anhydride 25
Grafting maleic anhydride with ethylene propylene terpolymer 25
Glass fibre 20
Stearic acid 15
Oxidation inhibitor 1,098 2.5
Earlier with polyphenylene sulfide and aluminium nitride, silicon carbide fiber in the above-mentioned prescription in air dry oven 80 ℃ dry 5 hours down, again with load weighted each raw material mixing in high-speed mixer, with the banburying 15 minutes in Banbury mixer of the raw material that mixes, be transferred to then in the twin screw extruder loading hopper, fiber adds from adding fine mouthful, 260 ℃ of left and right sides fusions, extrude, pelletizing, the moulded heat-conductive insulated plastics of injection moldable, injection pressure is 165bar, and be 1.2 seconds inject time.
This heat-conducting plastic is made heat-conducting plastic test product by injection molding, and this heat-conducting plastic product thermal conductivity is 1.9w/mk, and tensile strength is 39.9MPa, and flexural strength is 650MPa, and modulus in flexure is 10.4GPa, and notched Izod impact strength is 3KJ/m2.
Embodiment two
Composition of raw materials (gram)
Polyphenylene sulfide 300
Boron nitride 600
Carbon fiber 100
Styrene-grafted maleic anhydride 30
Grafting maleic anhydride with ethylene propylene terpolymer 28
Glass fibre 28
Stearic acid 25
Oxidation inhibitor 1,098 3.5
Earlier with polyphenylene sulfide and boron nitride, carbon fiber in the above-mentioned prescription in air dry oven 80 ℃ dry 5 hours down, again with load weighted each raw material mixing in high-speed mixer, with the banburying 15 minutes in Banbury mixer of the raw material that mixes, be transferred to then in the twin screw extruder loading hopper, fiber adds from adding fine mouthful, 260 ℃ of left and right sides fusions, extrude, pelletizing, the moulded heat-conductive insulated plastics of injection moldable, injection pressure is 165bar, and be 1.2 seconds inject time.
These plastics are made the heat-conducting plastic product by injection molding, and this heat-conducting plastic product thermal conductivity is 3.6w/mk, and tensile strength is 29MPa, and flexural strength is 564MPa, and modulus in flexure is 8.4GPa, and notched Izod impact strength is 2.9KJ/m2.
Embodiment three
Composition of raw materials (gram)
Polycarbonate 500
Silicon carbide 350
Sapphire whisker 150
Polypropylene grafted maleic anhydride 25
Grafting maleic anhydride with ethylene propylene terpolymer 25
Carbon fiber 20
Stearic acid 20
Oxidation inhibitor 168 2.0
Earlier with polycarbonate and silicon carbide, sapphire whisker in the above-mentioned prescription in air dry oven 90 ℃ dry 6 hours down, again with load weighted each raw material mixing in high-speed mixer, with the banburying 15 minutes in Banbury mixer of the raw material that mixes, be transferred to then in the twin screw extruder loading hopper, fiber adds from adding fine mouthful, 260 ℃ of left and right sides fusions, extrude, pelletizing, the moulded heat-conductive insulated plastics of injection moldable, injection pressure is 165bar, and be 1.2 seconds inject time.
These plastics are made the heat-conducting plastic product by injection molding, and this heat-conducting plastic product thermal conductivity is 1.5w/mk, and tensile strength is 50MPa, and flexural strength is 672MPa, and modulus in flexure is 12.4GPa, and notched Izod impact strength is 6KJ/m2.
Embodiment four
Composition of raw materials (gram)
Polymeric amide 400
Silicon carbide 550
Boron nitride fibre 50
Polypropylene grafted maleic anhydride 30
Ethylene-octene copolymer grafted maleic anhydride 25
Glass fibre 24
Polyethylene wax 24
Oxidation inhibitor 168 1.5
Oxidation inhibitor 1,098 1.5
Earlier with polymeric amide and silicon carbide, boron nitride fibre in the above-mentioned prescription in air dry oven 90 ℃ dry 5 hours down, again with load weighted each raw material mixing in high-speed mixer, with the banburying 10 minutes in Banbury mixer of the raw material that mixes, be transferred to then in the twin screw extruder loading hopper, fiber adds from adding fine mouthful, 260 ℃ of left and right sides fusions, extrude, pelletizing, the moulded heat-conductive insulated plastics of injection moldable, injection pressure is 165bar, and be 1.2 seconds inject time.
These plastics are made the heat-conducting plastic product by injection molding, and this heat-conducting plastic product thermal conductivity is 1.47w/mk, and tensile strength is 50MPa, and flexural strength is 700MPa, and modulus in flexure is 15.8GPa, and notched Izod impact strength is 9KJ/m2.
Embodiment five
Composition of raw materials (gram)
Liquid crystal high polymers (LCP) 400
Aluminium nitride 300
Silicon carbide 200
Carbon fiber 100
Polypropylene grafted maleic anhydride 30
Ethylene-vinyl acetate copolymer 25
Glass fibre 18
Polyamide wax 24
Oxidation inhibitor 168 2.0
Earlier with liquid crystal high polymers and aluminium nitride, silicon carbide, carbon fiber in the above-mentioned prescription in air dry oven 100 ℃ dry 4 hours down, again with load weighted each raw material mixing in high-speed mixer, with the banburying 20 minutes in Banbury mixer of the raw material that mixes, be transferred to then in the twin screw extruder loading hopper, fiber adds from adding fine mouthful, 340 ℃ of left and right sides fusions, extrude, pelletizing, the moulded heat-conductive insulated plastics of injection moldable, injection pressure is 165bar, and be 1.2 seconds inject time.
These plastics are made the heat-conducting plastic product by injection molding, and this heat-conducting plastic product thermal conductivity is 4.0w/mk, and tensile strength is 50MPa, and flexural strength is 700MPa, and modulus in flexure is 15.8GPa, and notched Izod impact strength is 9KJ/m2.
Claims (8)
1. office's heat conductive insulating engineering plastics, it is characterized in that: including mass ratio is 1: the plastic substrate of 1-9 and heat conductive filler, described plastic substrate is a kind of in polymeric amide, polybutylene terephthalate, polyphenylene oxide resin, polyphenylene sulfide and the polycarbonate, and described thermally conductive material is one or more in aluminium nitride, silicon carbide, boron nitride, aluminium sesquioxide and the carbon fiber.
2. engineering plastics according to claim 1, it is characterized in that, also include expanding material, content is the 1-5% of heat conductive filler quality summation, and described expanding material is polypropylene grafted maleic anhydride, polycthylene grafted maleic anhydride, styrene-butadiene-styrene block copolymer grafted maleic anhydride, styrene-grafted maleic anhydride, one or more mixing wherein of styrene-ethylene-butylene-styrene segmented copolymer grafted maleic anhydride.
3. engineering plastics according to claim 1, it is characterized in that, also include toughner, content is the 1-10% of heat conductive filler quality summation, and described toughner is one or more mixing wherein of ethylene-vinyl acetate copolymer, ethylene-vinyl acetate copolymer grafted maleic anhydride, grafting maleic anhydride with ethylene propylene terpolymer, styrene-butadiene-styrene block copolymer grafted maleic anhydride, ethylene-octene copolymer grafted maleic anhydride.
4. engineering plastics according to claim 1, it is characterized in that, also include toughener, content is the 1-5% of heat conductive filler quality summation, and described toughener is one or more mixing wherein of glass fibre, carbon fiber, sapphire whisker, silicon carbide fiber, steel fiber.
5. engineering plastics according to claim 1 is characterized in that, also include lubricant, and content is the 1-4% of heat conductive filler quality summation, and described lubricant is one or more mixing wherein of stearic acid, Zinic stearas, polyethylene wax, polyamide wax.
6. engineering plastics according to claim 1; it is characterized in that; also include oxidation inhibitor; content is the 0.3-0.6% of heat conductive filler quality summation; described oxidation inhibitor is N; wherein one or more mixing of N '-two-(3-(3, the 5-di-tert-butyl-hydroxy phenyl) propionyl) hexanediamine (oxidation inhibitor 1098), tricresyl phosphite (2, the 4-di-tert-butyl-phenyl) esters (oxidation inhibitor 168).
7. according to described any one engineering plastics of claim 1 to 6, it is characterized in that be made up of plastic substrate, heat conductive filler, expanding material, toughner, toughener, lubricant, oxidation inhibitor, the weight fraction consumption of each component is as follows:
100 parts of plastic substrates
Heat conductive filler 100-900 part
Expanding material 1-45 part
Toughner 1-90 part
Toughener 1-45 part
Lubricant 1-36 part
Oxidation inhibitor 0.3-5.4 part.
8. preparation method of high heat conductive insulating engineering plastics according to claim 1 is characterized in that step is as follows:
A), will be according to the load weighted plastic substrate of weight proportion and heat conductive filler in 60-100 ℃ of air dry oven dry 4-8 hour;
B), each component is put in the high-speed mixer and to be mixed 3-5 minute;
C), with said mixture in Banbury mixer banburying 10-30 minute;
D), said mixture is pulverized in Material disintegrator evenly, be transferred to the loading hopper of twin screw extruder then, the fiber-like filler entered from fine mouthful of adding of twin screw extruder, got final product through fusion-mixing-extrude-cool off-drying-pelletizing.
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