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Polyphenylene sulfide composite material sheet with high vertical heat conductivity and preparation method thereof

A technology of polyphenylene sulfide and composite materials, which is applied in the directions of heat exchange materials, chemical instruments and methods, can solve the problems of reducing the isotropy of thermal conductivity of materials, and achieve good thermal stability, migration resistance and production cost. Low, simple industrial preparation effect

Inactive Publication Date: 2019-08-09
JIANGSU NEW CARBON NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong van der Waals force and π-π interaction between the graphite sheets, the graphite sheets are easy to agglomerate and stack, and the degree of plane orientation is increased, which reduces the isotropy of the thermal conductivity of the material.

Method used

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  • Polyphenylene sulfide composite material sheet with high vertical heat conductivity and preparation method thereof
  • Polyphenylene sulfide composite material sheet with high vertical heat conductivity and preparation method thereof
  • Polyphenylene sulfide composite material sheet with high vertical heat conductivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step (1): Dry polyphenylene sulfide, flake graphite, and spherical graphite in vacuum at 80°C for 24 hours:

[0038] Step (2): Add 50g of polyphenylene sulfide, 47.5g of flake graphite, 2.5g of spherical graphite and 1g of silicone powder into an internal mixer at 300°C for melting and mixing. The rotor speed was 20 rpm, and the melt kneading was carried out for 2 minutes, and then the rotor speed was increased to 50 rpm, and the melt kneading was carried out for 5 minutes to obtain a blend.

[0039] Step (3) The obtained blend is subjected to melt compression at a pressure of 25 MPa and a temperature of 300° C. for 3 minutes, and then at a pressure of 25 MPa and at room temperature for 2 minutes to prepare a sheet with a thickness of 500 μm.

[0040] The test results of the samples are shown in Table 1.

Embodiment 2

[0042] Step (1): Dry polyphenylene sulfide, flake graphite, and spherical graphite in vacuum at 80°C for 24 hours:

[0043] Step (2): Add 50g of polyphenylene sulfide, 45g of flake graphite, 5g of spherical graphite and 1g of silicone powder into the internal mixer at 300°C for melting and mixing, and the rotor speed of the internal mixer during premixing 20 rpm, melt kneading for 2 minutes, and then increase the rotor speed to 50 rpm, melt kneading for 5 minutes to obtain a blend.

[0044] Step (3) The obtained blend is subjected to melt compression at a pressure of 25 MPa and a temperature of 300° C. for 3 minutes, and then at a pressure of 25 MPa and at room temperature for 2 minutes to prepare a sheet with a thickness of 500 μm.

[0045] The test results of the samples are shown in Table 1.

Embodiment 3

[0047] Step (1): Dry polyphenylene sulfide, flake graphite, and spherical graphite in vacuum at 80°C for 24 hours:

[0048] Step (2): Add 50g of polyphenylene sulfide, 40g of flake graphite, 10g of spherical graphite and 1g of silicone powder into the internal mixer for melting and mixing at 300°C. The rotor speed of the internal mixer during premixing 20 rpm, melt kneading for 2 minutes, and then increase the rotor speed to 50 rpm, melt kneading for 5 minutes to obtain a blend.

[0049] Step (3) The obtained blend is subjected to melt compression at a pressure of 25 MPa and a temperature of 300° C. for 3 minutes, and then at a pressure of 25 MPa and at room temperature for 2 minutes to prepare a sheet with a thickness of 500 μm.

[0050] The test results of the samples are shown in Table 1.

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Abstract

The invention discloses a polyphenylene sulfide composite material sheet with high vertical heat conductivity and a preparation method thereof. A polyphenylene sulfide material is a blend of polyphenylene sulfide and a carbon filler. The carbon filler at least comprises a two-dimensional carbon structure and a zero-dimensional carbon structure. The preparation method comprises the steps that driedpolyphenylene sulfide and the carbon filler are added into a melting and mixing device to perform melting and mixing at the temperature of 290-310 DEG C to obtain a compound; the compound is discharged from the melting and mixing device and cooled to normal temperature to obtain the polyphenylene sulfide composite material; the composite material is pressed into the sheet with the thickness of 100-500 micron through a flat vulcanizing machine. The polyphenylene sulfide composite material sheet has excellent heat conduction performance in the vertical direction. Due to the addition of two-dimensional and zero-dimensional fillers, the plane orientation degree of a filler pile can be reduced, and a relatively perfect multi-dimensional packing network is formed. Moreover, the preparation method only needs to use the common melting and mixing device, and industrial preparation is simple.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to polyphenylene sulfide composite materials with high thermal conductivity obtained by hybridization of various fillers and a preparation method thereof. Background technique [0002] Plastic heat exchangers have become a research hotspot in recent years due to their low cost, light weight and corrosion resistance, and have been widely used to replace traditional metal heat exchangers. Polyphenylene sulfide is a special engineering plastic with excellent heat resistance, chemical corrosion resistance and good processing performance. It is widely used in the fields of electronics, machinery, chemical engineering and automobile manufacturing. It is an ideal Plastic heat exchanger base material. Carbon-based fillers are usually used as thermally conductive fillers because they can conduct dual heat transfer through internal electrons and phonons, and their asymmetric stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08L83/04C08K7/00C08K3/04C08K7/18C08J5/18C09K5/14
CPCC08J5/18C08J2381/02C08J2483/04C08K3/04C08K7/00C08K7/18C08K2201/003C09K5/14
Inventor 李勇进张文军
Owner JIANGSU NEW CARBON NEW MATERIAL TECH CO LTD
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