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Thermal conductive carbon fiber reinforced PET (polyethylene terephthalate)/polyester alloy and preparation method thereof

A polyester alloy and carbon fiber technology is applied in the field of thermally conductive carbon fiber reinforced PET/polyester alloy and its preparation. , the effect of optimizing mechanical properties and thermal conductivity

Active Publication Date: 2014-09-17
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a thermally conductive carbon fiber reinforced PET / polyester alloy in order to solve the above-mentioned technical problems such as high cost of thermally conductive alloy materials, poor appearance, and insufficient mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A thermally conductive carbon fiber reinforced PET / polyester alloy, calculated by weight percentage, the composition and content of its raw materials are as follows:

[0059] PET 34.8%

[0060] Polyester 8.7%

[0061] Nucleating agent 4%

[0062] Thermally conductive filler 45%

[0063] Carbon fiber 5%

[0064] Coupling agent 1%

[0065] Antioxidant 1%

[0066] Lubricant 0.5%;

[0067] The PET is polyethylene terephthalate with a viscosity of 0.8-0.9 dl / g;

[0068] The polyester is polyethylene 2,6-naphthalate (hereinafter referred to as PEN);

[0069] The nucleating agent is the ionomer Surlyn 8920 of DuPont, USA;

[0070] The thermally conductive filler is graphite with a particle size of 44um and alumina with a particle size of 30nm, calculated by mass ratio, that is, a mixture of graphite and alumina in a 2:1 composition;

[0071] The carbon fiber is a high-strength carbon fiber T300, with a tensile strength of 3000-4000 MPa, and a ratio of tensile strength to stiffness of 1.5-2.0%; ...

Embodiment 2

[0080] A thermally conductive carbon fiber reinforced PET / polyester alloy, calculated by weight percentage, the composition and content of its raw materials are as follows:

[0081] PET 37.4%

[0082] Polyester 6.6%

[0083] Nucleating agent 3%

[0084] Thermal conductive filler 40%

[0085] Carbon fiber 10%

[0086] Coupling agent 1.5%

[0087] Antioxidant 1%

[0088] Lubricant 0.5%;

[0089] The PET is polyethylene terephthalate with a viscosity of 0.8-0.9 dl / g;

[0090] The polyester is polytrimethylene terephthalate (hereinafter referred to as PTT);

[0091] The nucleating agent is the ionomer Surlyn 8920 of DuPont, USA;

[0092] The thermally conductive filler is graphite with a particle size of 44um and alumina with a particle size of 30nm, calculated by mass ratio, that is, a mixture of graphite and alumina of 7:3;

[0093] The carbon fiber is a high-strength carbon fiber T300, with a tensile strength of 3000-4000 MPa, and a ratio of tensile strength to stiffness of 1.5-2.0%;

[0094] The...

Embodiment 3

[0102] A thermally conductive carbon fiber reinforced PET / polyester alloy, calculated by weight percentage, the composition and content of its raw materials are as follows:

[0103] PET 37.4%

[0104] Polyester 6.6%

[0105] Nucleating agent 3%

[0106] Thermal conductive filler 40%

[0107] Carbon fiber 10%

[0108] Coupling agent 1.5%

[0109] Antioxidant 1%

[0110] Lubricant 0.5%;

[0111] The PET is polyethylene terephthalate with a viscosity of 0.8-0.9 dl / g;

[0112] The polyester is polybutylene terephthalate (hereinafter referred to as PBT);

[0113] The nucleating agent is the ionomer Surlyn 8920 of DuPont, USA;

[0114] The thermally conductive filler is graphite with a particle size of 44um and alumina with a particle size of 30nm, calculated by mass ratio, that is, a mixture of graphite and alumina of 7:3;

[0115] The carbon fiber is a high-strength carbon fiber T300, with a tensile strength of 3000-4000 MPa, and a ratio of tensile strength to stiffness of 1.5-2.0%;

[0116] The com...

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Abstract

The invention discloses a thermal conductive carbon fiber reinforced PET (polyethylene terephthalate) / polyester alloy and a preparation method thereof. The PET / polyester alloy is composed of the following components in percentage by weight: 30-40% of PET, 4-10% of polyester, 2-4% of a nucleating agent, 30-45% of thermal conductive filler, 5-20% of carbon fiber, 1-2% of a coupling agent, 0.5-1% of an antioxidant and 0.5-1% of a lubricant. The preparation method of the PET / polyester alloy comprises the following steps: firstly, mixing the PET, the polyester, the nucleating agent, the thermal conductive filler, the coupling agent, the antioxidant and the lubricant for 3-5 minutes in a high-speed mixing machine; then, adding the obtained mixture from a first-section barrel of a twin-screw extruder, and then adding the carbon fiber from a fourth-section barrel of the twin-screw extruder; and through controlling the rotating speed of the twin-screw extruder to be 1050-1200rpm and controlling the temperature at 240-250 DEG C, carrying out extrusion granulating, thus obtaining the thermal conductive carbon fiber reinforced PET / polyester alloy which has the advantages of high mechanical property, short molding cycle and good product appearance.

Description

technical field [0001] The invention relates to a heat-conducting carbon fiber reinforced PET / polyester alloy and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] At present, with the continuous development of science and technology, heat dissipation materials are required in many fields. However, due to limitations in weight and processing performance, materials such as metals and ceramics with excellent thermal conductivity are difficult to meet the needs of modern industries. Therefore, plastic products that are relatively light in weight and relatively easy to process have become ideal substitutes. However, the thermal conductivity of unmodified ordinary plastics is very low, generally only 0.2-0.5W / (m.K). In this case, the development of high-performance thermally conductive plastics has become a new trend. [0003] Polyethylene terephthalate (hereinafter referred to as PET) has excellent mechanical properties, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/04C08K7/06C08K3/04C08K3/22C08K5/134C08K5/526B29B9/06
Inventor 徐群杰王瑞元陈晓东付杰辉王锡军
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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