Thermal conducting polymer composite material and preparation method thereof

A technology of thermally conductive polymers and composite materials, applied in the field of polymer materials, can solve the problems of reducing mechanical properties and comprehensive properties of composite materials, and achieve the effects of shortening the processing cycle, improving mechanical properties, and expanding industrial applications

Inactive Publication Date: 2018-08-24
江苏新其石墨烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Thermally conductive polymer composites are widely used in the fields of production and life. To improve their thermal conductivity, thermally conductive fillers are usually added to them. However, adding a large amount of fillers will inevitably reduce their mechanical properties and the overall performance of their composite materials.

Method used

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  • Thermal conducting polymer composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Vacuum dry polypropylene and PA6 at 80°C for 12 hours;

[0018] (2) 5 parts by weight of PA6 and 5 parts by weight of boron nitride that have been dried are put into an internal mixer and melt blended at 240° C., and the blending time is 5 minutes to obtain a PA6 / boron nitride mixture; Continue melt-blending the blended material and 95 parts by weight of polypropylene at 240° C., and the blending time is 5 minutes;

[0019] (3) After drying and granulating, carry out micro-injection molding processing, the injection speed is 300mm / s, the injection temperature is 260°C, the injection pressure is 1200bar, and the mold temperature is 80°C; the shape of the obtained spline is dumbbell-shaped, and the size is 15* 3*0.3mm 3 . The obtained splines were tested for mechanical properties and thermal conductivity, and the performance results are shown in Table 1.

Embodiment 2

[0021] The preparation process is the same as in Example 1, the only difference being: 10 parts by weight of PA6, 5 parts by weight of boron nitride, and 90 parts by weight of polypropylene; the obtained sample strips are tested for mechanical properties and thermal conductivity, and the performance results are shown in Table 1 .

Embodiment 3

[0023] The preparation process is the same as in Example 1, the only difference being: 20 parts by weight of PA6, 5 parts by weight of boron nitride, and 80 parts by weight of polypropylene; the obtained sample strips are tested for mechanical properties and thermal conductivity, and the performance results are shown in Table 1 .

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Abstract

The invention belongs to the field of high polymer materials, and in particular relates to a thermal conducting polymer composite material and a preparation method thereof. The thermal conducting polymer composite material provided by the invention is prepared from a polymer 1, a polymer 2 and thermal conductive filler and is prepared by means of melt blending and a micro injection molding method;the polymer 2 in the composite material has a microfiber structure; the ratio of the polymer 1, the polymer 2 and the thermal conductive filler is as follows: 80-95 parts by weight of the polymer 1,5-20 parts by weight of the polymer 2 and 1-10 parts by weight of the thermal conductive filler; the melting point of the polymer 1 is less than that of the polymer 2; the melt index of the polymer 1is less than that of the polymer 2; the thermal conductive filler is selectively distributed in the polymer 2 or on the surface thereof. The composite material obtained by the method has good thermalconductivity and mechanical properties at the same time.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a heat-conducting polymer composite material and a preparation method thereof. Background technique [0002] Thermally conductive polymer composites are widely used in the fields of production and life. To improve their thermal conductivity, thermally conductive fillers are usually added to them. However, adding a large amount of fillers will inevitably reduce their mechanical properties and the overall performance of the composite material. Contents of the invention [0003] In view of the above defects, the present invention provides a thermally conductive polymer composite material, and the obtained composite material has good thermal conductivity and mechanical properties at the same time. [0004] Technical scheme of the present invention: [0005] The first technical problem to be solved by the present invention is to provide a thermally conductive polymer co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L77/02C08K3/38
CPCC08L23/12C08K2003/385C08L77/02C08K3/38
Inventor 杨其
Owner 江苏新其石墨烯科技有限公司
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