Carbon fiber reinforced thermoplastic resin composite material and preparation method of carbon fiber reinforced thermoplastic resin composite material

A technology of resin composite materials and enhanced thermoplasticity, which is applied in the field of carbon fiber reinforced polybutylene terephthalate composite materials and its preparation, can solve problems such as drop, high density, and high price, and achieve expansion of application fields and preparation processes Simplicity and the effect of improving mechanical properties

Active Publication Date: 2014-12-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal thermally conductive fillers have the disadvantages of high density, corrosion, and the decline in the mechanical properties of PBT materials; inorganic non-metallic fillers are not very effective in improving the thermal conductivity of PBT resins, and often reduce the mechanical properties of PBT resins.
Although the methods of adopting graphene, carbon nanotubes and carbon nanofibers in carbon materials can significantly improve the thermal conductivity of PBT resins, these materials cannot be industrialized and mass-produced, and the price is expensive, and the technology involved only stays in the laboratory research stage
High-performance pitch-based carbon fiber is a rare carbon material with a graphite structure that has achieved large-scale industrial production. Japan's Teijin Corporation (such as Chinese patent CN101935919B, etc.) uses pitch-based carbon fiber with high thermal conductivity to improve polycarbonate and polyphenylene sulfide. , polypropylene, polylactic acid and silicone and other resins, but there is no report that this method is used to improve the thermal conductivity and / or mechanical properties of PBT

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take by weight 100 parts of PBT resin, 20 parts of carbon fiber, 10 parts of inorganic filler (talcum powder, magnesium oxide and silicon carbide, weight ratio 1:2:4), coupling agent (KH-570 and KR38S, weight ratio 1 : 1) 0.5 part, 0.2 part of antioxidant (1098) and 0 part of lubricant; put PBT resin, maleic anhydride grafted PBT resin, inorganic filler, coupling agent, antioxidant and lubricant into high-speed mixing Mix evenly at high speed in the machine, feed to the hopper of the extruder, add carbon fiber at the fiber feeding port of the extruder, control the temperature of each zone from the feeding port to the die head of the extruder to be 190°C, 220°C, 240°C, 240°C °C, 240 °C, 240 °C, the speed of the main engine is 50 Hz, and the composite material can be obtained by extruding and granulating through a twin-screw extruder.

[0029]The average length of the carbon fiber in the sample of this embodiment is 512 μm, and the various properties of the composite mate...

Embodiment 2

[0031] Take by weight 100 parts of PBT resin, 80 parts of carbon fiber, 10 parts of inorganic filler (talcum powder, magnesium oxide and silicon carbide, weight ratio 1:2:4), coupling agent (KH-570 and KR38S, weight ratio 1 : 1) 5 parts, 1 part of antioxidant (1098) and 3 parts of lubricant (ethylene bis fatty acid amide). Then the composite material was prepared by the same method as in Example 1.

[0032] The average length of the carbon fiber in the sample of this embodiment is 124 μm, and the properties of the composite material are respectively: flexural strength 623 MPa, flexural modulus 64.8 GPa, thermal conductivity 3.8 W / (mK). The flexural strength, modulus and thermal conductivity are 7.3 times, 24.9 times and 17.3 times that of pure PBT resin, respectively, and the rigidity and thermal conductivity are significantly improved, which meets the requirements of thin-walled and lightweight auto parts and electronic / electrical products. Requirements, can greatly expand t...

Embodiment 3

[0034] Take by weight 100 parts of PBT resin, 40 parts of carbon fiber, 10 parts of inorganic filler (talcum powder, magnesium oxide and silicon carbide, weight ratio 1:2:4), coupling agent (KH-570 and KR38S, weight ratio 1 : 1) 2 parts, 0.6 part of antioxidant (1098) and 1 part of lubricant (ethylene bis fatty acid amide). Then the composite material was prepared by the same method as in Example 1.

[0035] The average length of the carbon fiber in the sample of this embodiment is 403 μm, and the properties of the composite material are respectively: bending strength 362 MPa, bending modulus 23.9 GPa, thermal conductivity 2.9 W / (mK). The flexural strength, modulus and thermal conductivity are 4.3 times, 9.2 times and 13.2 times that of pure PBT resin, respectively, and the rigidity and thermal conductivity are significantly improved, which meets the requirements of thin-walled and lightweight auto parts and electronic / electrical products. Requirements, can greatly expand the...

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Abstract

The invention relates to a carbon fiber reinforced thermoplastic resin composite material and a preparation method of the carbon fiber reinforced thermoplastic resin composite material. The carbon fiber reinforced thermoplastic resin composite material comprises the following raw materials in parts by weight: 100 parts of PBT resin, 20-80 parts of asphalt-based chopped carbon fiber, 10-20 parts of inorganic filler, 0.5-5 parts of a coupling agent, 0.2-1 part of an antioxidant and 0-3 parts of a lubricating agent. Compared with the prior art, the composite material provided by the invention has the advantages of high rigidity, good heat-conducting property, low raw material cost, simple preparation process, is suitable for production and manufacturing of thin-wall and lightweight car parts and electronic/electric products and is suitable for industrial continuous production.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber composite materials, in particular to a carbon fiber reinforced polybutylene terephthalate (PBT) composite material with excellent thermal conductivity and a preparation method thereof. Background technique [0002] PBT (polybutylene terephthalate) is a crystalline linear saturated polyester, PBT resin is known for its excellent heat resistance, weather resistance, chemical resistance, electrical insulation, processing performance, especially Good comprehensive performance has been widely used in the fields of electronic appliances, automobile industry and machinery, instrumentation and household appliances. Specific uses such as distributors in automobiles, car body parts, igniter coil skeletons, insulating covers, exhaust system parts, motorcycle igniters, connectors in the electrical and electronic industry, deflection coils for televisions, and picture tubes And potentiometer bracket, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L51/08C08K13/04C08K7/06C08K3/34C08K3/22C08K5/134C08K5/20C08K5/5425B29B9/06B29C47/92B29C48/92
Inventor 杨斌王新灵张媛媛刘媛宋晨晨
Owner SHANGHAI JIAO TONG UNIV
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