CN102675738A - Heat-resistant conductive polypropylene composite material and preparation method thereof - Google Patents
Heat-resistant conductive polypropylene composite material and preparation method thereof Download PDFInfo
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- CN102675738A CN102675738A CN2012101487769A CN201210148776A CN102675738A CN 102675738 A CN102675738 A CN 102675738A CN 2012101487769 A CN2012101487769 A CN 2012101487769A CN 201210148776 A CN201210148776 A CN 201210148776A CN 102675738 A CN102675738 A CN 102675738A
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Abstract
The invention discloses a heat-resistant conductive polypropylene composite material and a preparation method thereof; the heat-resistant conductive polypropylene composite material comprises components in parts by mass: 45-75 parts of polypropylene, 5-30 parts of glass fiber and 16-24 parts of conductive carbon black. The composite material takes polypropylene as matrix resin and is prepared by a one-step melt kneading method; the glass fiber and the conductive carbon black have an obvious conductive synergistic effect, so that the composite material has excellent rigidity, heat resistance and good electrical conductivity; and the surface resistance is not higher than 109W, so that the composite material can be applied to a package and a chip carrier with anti-static requirement as well as a motor vehicle and the information and communication industry with electromagnetic shielding requirement.
Description
Technical field
The present invention relates to a kind of PP composite material, particularly a kind of heat-resisting conductive polypropylene composite material and preparation method thereof.
Background technology
Fiber glass reinforced polypropylene is in original polypropylene matrix, adds spun glass and other auxiliary agents, to improve the rigidity and the thermotolerance of material, reduces shrinking percentage.In general, most of glass fiber reinforced materials is used on the structural parts of product more, is a kind of Structural Engineering material, has enlarged the use range of acrylic resin.
Carbon black is the most frequently used conductive filler material, and raw material is easy to get, light weight, and its volume specific resistance is about 0.1Wcm, and is different according to loading level, resistivity that can the flexible matrix material.Carbon black filled composite material forming processing is simple, has been widely used in fields such as electronics, the energy, chemical industry, aerospace.
Patent CN200810217526.X discloses a kind of conductive plastics, and it comprises the polymeric substrate of 0-70%, the spun glass of 15-50%, the conductive carbon black of 10-35%, and the properties-correcting agent of 1-5%.What this patent polymeric substrate adopted is ppe; It mainly is the thermotolerance that has improved conductive plastics; Its preparation method is accomplished in two steps; At first spun glass and matrix and graphitized carbon black and matrix are melt extruded granulation respectively, and then two kinds of particles will making mix according to certain ratio, promptly get strongthener with anti-static function.But, compare the disposable machine-shaping of extruding, many and loaded down with trivial details with the two-step approach production stage, this patent is not done clear and definite elaboration to the electroconductibility of gained material after two kinds of mix particles simultaneously.
Patent CN200410024686.4 discloses a kind of preparation method of antistatic and conducting polypropylene (PP) blend, is to join simultaneously with Vestolen PP 7052, epoxy resin, after the spun glass of coupling agent treatment and graphitized carbon black mix that melt blending promptly gets in the Banbury mixer.This method is relied on the polarity of epoxy resin, forms epoxy and is coated on fiberglass surfacing, and the graphitized carbon black precedence partition is this particular structure in epoxy resin, has reduced the volume resistance of PP effectively.Vestolen PP 7052 and epoxy resin compatibility property are poor, the compound system mechanical property is not good but exist, defective such as conduction synergistic effect reduction when simultaneously glass fiber content is higher.
Summary of the invention
For the shortcoming and deficiency that overcome prior art, primary and foremost purpose of the present invention is to provide a kind of heat-resisting conductive polypropylene composite material with superior stiffness, thermotolerance and good electrical conductivity.
Another object of the present invention is to provide the preparation method of above-mentioned heat-resisting conductive polypropylene composite material.
The present invention realizes through following technical scheme:
A kind of heat-resisting conductive polypropylene composite material is characterized in that, comprises following component:
(A) Vestolen PP 7052 of 45 to 75 mass parts;
(B) spun glass of 5 to 30 mass parts;
(C) graphitized carbon black of 16 to 24 mass parts.
Said Vestolen PP 7052 is selected from HOPP or COPP, be preferably melting index 20-80g/10min (230 ℃, HOPP 2.16kg).The present invention adopts the high molten Vestolen PP 7052 that refers to, and is effective to spun glass and graphitized carbon black moistened surface, impels two kinds of fillers in forcing machine, to mix more evenly, guarantees still moulding smoothly when the more viscosity of filler is higher simultaneously.Simultaneously, the high molten HOPP molecular chain that refers to is shorter, and crystal property is good, can carbon black be discharged outside lattice, and the non-crystalline region content of carbon black is increased, and electroconductibility improves.
Said spun glass is that diameter is the alkali free glass fibre of 7-18 μ m, can be the direct roving of alkali free glass fibre, also can be the alkali free glass fibre chopped strand.
The DBP absorption value of said graphitized carbon black is at 100-460ml/100g.
Heat-resisting conductive polypropylene composite material of the present invention can also comprise the compatilizer of (D) 0 to 5 mass parts and the oxidation inhibitor of 0.01 to 2 mass parts.
Compatilizer can improve the binding property between spun glass and the acrylic resin, improves the rigidity or the toughness of matrix material.Compatilizer according to the invention is a maleic anhydride grafts, is selected from one or more the mixture in maleic anhydride graft PE, maleic anhydride graft PP, maleic anhydride graft POE, maleic anhydride graft SEBS, the maleic anhydride grafted ethene-propylene copolymer.
Said oxidation inhibitor is selected from one or more the mixture in Hinered phenols, hindered amines, the phosphite ester kind antioxidant.
The surface resistivity of heat-resisting conductive polypropylene composite material of the present invention is not higher than 10
9Ω.
The preparation method of heat-resisting conductive polypropylene composite material of the present invention comprises the steps:
The compatilizer of a, the Vestolen PP 7052 that takes by weighing (A) 45 to 75 mass parts, (D) 0 to 5 mass parts and the oxidation inhibitor of 0.01 to 2 mass parts add high-speed stirring mixer and mix the material that obtains mixing;
B, the main spout of the above-mentioned material that mixes from twin screw extruder added; The spun glass of (B) 5 to 30 mass parts, the graphitized carbon black of (C) 16 to 24 mass parts are added from two side spouts of twin screw extruder respectively, squeeze out ﹑ through overmulling refining ﹑ and draw the cold but ﹑ of bar ﹑ pelletizing promptly to get heat-resisting conductive polypropylene composite material.
The present invention compared with prior art has following beneficial effect:
Heat-resisting conductive polypropylene composite material of the present invention is to be matrix resin with the Vestolen PP 7052, through a step melt kneading method, and the disposable preparation of in twin screw extruder, accomplishing glass reinforcing carbon black filled conductive matrix material, preparation technology is simple; Select the high molten acrylic resin that refers to for use, glass and graphitized carbon black are mixed, improve processibility, improve conductive effect simultaneously; The adding of spun glass impels the surface resistivity of matrix material obviously to reduce, and conductive network can form when hanging down the carbon black addition, and spun glass and graphitized carbon black have tangible conduction synergistic effect; This heat-resisting conducing composite material has superior stiffness, thermotolerance and good electrical conductivity, and surface resistivity is not higher than 10
9W is at the packing that the anti-electrostatic requirement is arranged, chip carrier with have in Motor vehicles that electromagnetic shielding requires, the information communication industry and all can use.
Embodiment
Further specify the present invention through embodiment below, following examples are preferred implementation of the present invention, but embodiment of the present invention does not receive the restriction of following embodiment.
In table 1, table 3 illustrated embodiment and the Comparative Examples prescription: the Vestolen PP 7052 of being selected for use is the PP HJ4045 that Korea S oiling company produces; Compatilizer is the maleic anhydride inoculated polypropylene PC-1 that Guangzhou Bai Chen company produces, and percentage of grafting is 0.5%; Carbon black is Cabot graphitized carbon black VXC-500; Spun glass is the alkali-free short glass fiber ESC13-4.5-508A that Jushi Group Co., Ltd. produces; Oxidation inhibitor is the hindered phenol antioxygen Irganox 1010 of vapour Bagong department production and the compound of organophosphite Irganox 168, and ratio is 1:2.
Its preparation method: count by weight; Taking by weighing the main spout that Vestolen PP 7052, oxidation inhibitor and lubricant mix in high-speed stirring mixer after 10 minutes at twin screw extruder adds; Spun glass and graphitized carbon black add from two side spouts of forcing machine respectively, control the graphitized carbon black additional proportion through regulating the main feeding capacity of feeding with side of feeding, and the barrel temperature is controlled at 160-220 ℃; Screw speed is 320 rev/mins, melt extrudes granulation and promptly gets.
The performance test specimen preparation:
The above-mentioned particle of extruding after 4 hours, is injection molded into standard model through injection moulding machine 90 ℃ of dryings, and stretching, bending, density and heat-drawn wire are pressed the iso standard test, and surface resistivity is lower than 10
4Adopt the test of digital multimeter ohms range during W, surface resistivity is higher than 10
4Adopt the examination of portable resistor instrumentation during W.Test result is seen table 2 and table 4.
Table 1: the prescription of embodiment 1-7 is formed
Table 2: the physicals test result of embodiment 1-7
The prescription of table 3: Comparative Examples 1-4 is formed
The physicals test result of table 4: Comparative Examples 1-4
In Comparative Examples, for Vestolen PP 7052/graphitized carbon black compound system, content of carbon black forms the conducting network between 18-20 part, and surface resistivity arrives the conduction rank.In an embodiment, for Vestolen PP 7052/graphitized carbon black/glass fiber composite system, when adding 10 parts of glasses, content of carbon black forms the conducting network between 16-18 part; Add 20 parts of glasses, content of carbon black has formed in the time of 16 parts and has stablized the conducting network.Simultaneously, under identical content of carbon black, add fiberglass surfacing resistance will descend several times even several magnitude in the system.This explanation: (a) in that the carbon black addition is low can not form the conducting network time, the adding of glass can promote the formation of carbon black conducting network; (b) the carbon black addition is higher when having formed the conducting network, and the adding of glass can be improved carbon black conducting network structure, has the obvious synergistic electric action with carbon black.
Aspect mechanical property and thermal property, spun glass is the major cause of raising system rigidity and heat-drawn wire, and glass fiber content is high more, and amplitude is obvious more.
In sum; The adding of spun glass not only greatly the raising of degree the rigidity and the heat-drawn wire of matrix material; Widened the Application Areas of material, can impel system conducting network when content of carbon black is low, to form simultaneously, had tangible conduction synergistic effect with graphitized carbon black.
Claims (8)
1. a heat-resisting conductive polypropylene composite material is characterized in that, comprises following component:
(A) Vestolen PP 7052 of 45 to 75 mass parts;
(B) spun glass of 5 to 30 mass parts;
(C) graphitized carbon black of 16 to 24 mass parts;
Said Vestolen PP 7052 is at 230 ℃, and under the 2.16kg condition, melting index is at the HOPP of 20-80g/10min.
2. heat-resisting conductive polypropylene composite material according to claim 1 is characterized in that, said spun glass is that diameter is the alkali free glass fibre of 7-18 μ m.
3. heat-resisting conductive polypropylene composite material according to claim 1 is characterized in that, the DBP absorption value of said graphitized carbon black is 100-460ml/100g.
4. heat-resisting conductive polypropylene composite material according to claim 1 is characterized in that, also comprises the compatilizer of (D) 0 to 5 mass parts and the oxidation inhibitor of 0.01 to 2 mass parts.
5. heat-resisting conductive polypropylene composite material according to claim 4; It is characterized in that; Said compatilizer is a maleic anhydride grafts, is selected from one or more the mixture in maleic anhydride graft PE, maleic anhydride graft PP, maleic anhydride graft POE, maleic anhydride graft SEBS, the maleic anhydride grafted ethene-propylene copolymer.
6. heat-resisting conductive polypropylene composite material according to claim 4 is characterized in that, said oxidation inhibitor is selected from one or more the mixture in Hinered phenols, hindered amines, the phosphite ester kind antioxidant.
7. heat-resisting conductive polypropylene composite material according to claim 1 is characterized in that, said heat-resisting conductive polypropylene composite material surface resistivity is not higher than 10
9Ω.
8. the preparation method of each described heat-resisting conductive polypropylene composite material of claim 1 ~ 7 is characterized in that, comprises the steps:
The compatilizer of a, the Vestolen PP 7052 that takes by weighing (A) 45 to 75 mass parts, (D) 0 to 5 mass parts and the oxidation inhibitor of 0.01 to 2 mass parts add high-speed stirring mixer and mix the material that obtains mixing;
B, the main spout of the above-mentioned material that mixes from twin screw extruder added; The spun glass of (B) 5 to 30 mass parts, the graphitized carbon black of (C) 16 to 24 mass parts are added from two side spouts of twin screw extruder respectively, squeeze out ﹑ through overmulling refining ﹑ and draw the cold but ﹑ of bar ﹑ pelletizing promptly to get heat-resisting conductive polypropylene composite material.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103450563A (en) * | 2013-08-23 | 2013-12-18 | 吴江龙硕金属制品有限公司 | Conductive toughened plastic |
| CN103540051A (en) * | 2013-08-22 | 2014-01-29 | 吴江龙硕金属制品有限公司 | Electroconductive plastic |
| CN103971775A (en) * | 2014-05-09 | 2014-08-06 | 北京化工大学 | High temperature resistance neutron shield material and preparation method thereof |
| CN104045913A (en) * | 2014-07-10 | 2014-09-17 | 苏州新区华士达工程塑胶有限公司 | Conductive polypropylene |
| CN104260468A (en) * | 2014-09-17 | 2015-01-07 | 太仓泰邦电子科技有限公司 | Conductive plastic board and preparation method thereof |
| CN105482247A (en) * | 2015-12-04 | 2016-04-13 | 福建海源新材料科技有限公司 | Glass fiber and polypropylene battery case with conductive performance, and making method thereof |
| CN106009265A (en) * | 2016-06-14 | 2016-10-12 | 清华大学 | Preparation method of semiconductive shielding material for polypropylene insulation cables |
| CN108148274A (en) * | 2017-12-26 | 2018-06-12 | 唐山泉能自动化设备有限公司 | A kind of composite material of high conductivity |
| CN108192207A (en) * | 2017-12-28 | 2018-06-22 | 聚威工程塑料(上海)有限公司 | A kind of high-performance conductive PP composite material and preparation method |
| WO2019100746A1 (en) * | 2017-11-22 | 2019-05-31 | 南通市东方塑胶有限公司 | Conductive polypropylene composite and preparation method therefor |
| CN110591230A (en) * | 2019-10-15 | 2019-12-20 | 安徽强茗塑业科技有限公司 | Fiber-reinforced PP material and preparation method thereof |
| CN110746671A (en) * | 2019-09-09 | 2020-02-04 | 航天长屏科技有限公司 | Wave-absorbing material for microwave anechoic chamber, wave-absorbing pyramid and preparation method of wave-absorbing pyramid |
| CN113881146A (en) * | 2021-09-18 | 2022-01-04 | 金发科技股份有限公司 | Wear-resistant high-impact polypropylene composition and preparation method and application thereof |
| CN115109344A (en) * | 2022-08-08 | 2022-09-27 | 华芯电子科技(江苏)有限公司 | Preparation method of polypropylene composite material for intelligent toy movement |
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| CN107698870A (en) * | 2017-10-27 | 2018-02-16 | 夏杰 | A kind of polypropene composition and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540051A (en) * | 2013-08-22 | 2014-01-29 | 吴江龙硕金属制品有限公司 | Electroconductive plastic |
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| CN103971775A (en) * | 2014-05-09 | 2014-08-06 | 北京化工大学 | High temperature resistance neutron shield material and preparation method thereof |
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| CN104260468A (en) * | 2014-09-17 | 2015-01-07 | 太仓泰邦电子科技有限公司 | Conductive plastic board and preparation method thereof |
| CN105482247A (en) * | 2015-12-04 | 2016-04-13 | 福建海源新材料科技有限公司 | Glass fiber and polypropylene battery case with conductive performance, and making method thereof |
| CN106009265A (en) * | 2016-06-14 | 2016-10-12 | 清华大学 | Preparation method of semiconductive shielding material for polypropylene insulation cables |
| WO2019100746A1 (en) * | 2017-11-22 | 2019-05-31 | 南通市东方塑胶有限公司 | Conductive polypropylene composite and preparation method therefor |
| CN108148274A (en) * | 2017-12-26 | 2018-06-12 | 唐山泉能自动化设备有限公司 | A kind of composite material of high conductivity |
| CN108192207A (en) * | 2017-12-28 | 2018-06-22 | 聚威工程塑料(上海)有限公司 | A kind of high-performance conductive PP composite material and preparation method |
| CN110746671A (en) * | 2019-09-09 | 2020-02-04 | 航天长屏科技有限公司 | Wave-absorbing material for microwave anechoic chamber, wave-absorbing pyramid and preparation method of wave-absorbing pyramid |
| CN110591230A (en) * | 2019-10-15 | 2019-12-20 | 安徽强茗塑业科技有限公司 | Fiber-reinforced PP material and preparation method thereof |
| CN113881146A (en) * | 2021-09-18 | 2022-01-04 | 金发科技股份有限公司 | Wear-resistant high-impact polypropylene composition and preparation method and application thereof |
| CN115109344A (en) * | 2022-08-08 | 2022-09-27 | 华芯电子科技(江苏)有限公司 | Preparation method of polypropylene composite material for intelligent toy movement |
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