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Highly-conductive polyphenylene sulfide composite material and method for making same

A technology of polyphenylene sulfide and composite materials, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of unsatisfactory thermal deformation temperature, affecting the performance of composite materials, and adding more conductive carbon black, etc., to achieve The effect of light weight, stable resistivity and high modulus

Inactive Publication Date: 2008-04-16
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Some domestic patents have reported the preparation and application of highly conductive plastics, such as patent CN1528817A reporting a polyolefin / carbon black PTC conductive composite material and its preparation method, and patent CN1990535A introducing a conductive polypropylene material with excellent comprehensive properties. Preparation method, patent CN1583867 discloses a preparation method of antistatic and conductive polypropylene blends, but based on the properties of polyolefin itself, it cannot be used as a structural material, and at the same time, too much conductive carbon black is added, which affects the performance of composite materials; in addition, there is also the use of engineering plastics as a matrix to prepare conductive plastics, such as the patent CN1906249, which describes in detail the method for preparing conductive plastics by melting and kneading polyamide and polyphenylene ether, but the above-mentioned processing method has complex procedures, conductive plastics The disadvantages of non-flame retardancy and unsatisfactory heat distortion temperature limit the application of this kind of conductive engineering plastics in harsh conditions such as high heat, high humidity, and high strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] A preparation method for a highly conductive polyphenylene sulfide composite material, comprising the steps of:

[0032] Step 1: Fully soak the conductive fiber or conductive powder in the mixed aqueous solution of titanate coupling agent and absolute ethanol for 10-30 minutes, and the treatment temperature is 30-70°C, so that the coupling agent fully reacts with the surface of the fiber or powder, among which The proportion of the three is: 70-90% of conductive fiber or powder, 0.5-2.5% of coupling agent, and 10-20% of absolute ethanol.

[0033] Step 2: Weigh the polyphenylene sulfide resin according to the weight ratio, put it into the high-speed mixer together with the treated conductive powder and other additives, and dry mix it for 3-5 minutes;

[0034] Step 3: Put the mixed raw materials in step 2 into the hopper of the twin-screw extruder, add the conductive fiber from the side feeding port, control the mixing speed to 20-1000rpm / min, the screw speed to 200-450rp...

Embodiment 1

[0036]In Example 1, the highly conductive PPS composite material includes 59.0% PPS resin, 20% conductive chopped carbon fiber, 20% superconductive carbon black, and 1% processing aid. The chopped carbon fiber has a length of 6 mm and a diameter of 20 μm. The conductive powder is first treated with 2% coupling agent, and then the mixed material is put into the hopper of the twin-screw extruder, melted and blended, extruded and granulated to form a composite material. Among them, the processing technology is as follows: twin-screw extruder zone 1 temperature: 265°C; zone 2: 270°C; zone 3: 270°C; zone 4: 275°C; zone 5 temperature: 275°C; Zone: 280°C; Zone 8: 280°C; Machine head: 265°C; residence time 3-4min, pressure 15MPa.

Embodiment 2

[0038] In Example 2, the highly conductive PPS composite material includes 59.0% PPS resin, 20% conductive chopped carbon fiber, 19% superconductive carbon black, 1% carbon nanotube, and 1% processing aid. The chopped carbon fiber has a length of 6 mm and a diameter of 20 μm. The conductive powder is first treated with 2% coupling agent, and then the mixed material is put into the hopper of the twin-screw extruder, melted and blended, extruded and granulated to form a composite material. Among them, the processing technology is as follows: twin-screw extruder zone 1 temperature: 265°C; zone 2: 270°C; zone 3: 270°C; zone 4: 275°C; zone 5 temperature: 275°C; Zone: 280°C; Zone 8: 280°C; Machine head: 265°C; residence time 3-4min, pressure 15MPa.

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Abstract

The invention discloses a high electric conduction polyphenylene sulfide (PPS) composite material and the preparation method thereof. The percentage by weight of the compositions of the high electric conduction polyphenylene sulfide composite material is as follows: 40 to 70 percent of polyphenylene sulfide, 5 to 30 percent of conducting fiber, 5 to 30 percent of conducting powder, and other auxiliary agents from 0 to 5 percent. The conducting fiber and conducting powder in the conducing plastics provided by the invention disperse evenly with a plurality of lapping joints and high electric conductivity, thereby remarkably improving electric conductivity. The surface resistivity and volume resistivity of the material respectively reach 0.3-11.0 ohm and 0.07-8.5 ohm*cm, thereby meeting the requirements of plastic shaping techniques such as repeated injection molding, plastic extruding or die stamping. The processing art of the material is simple and can control the conducting fiber and conducting carbon black to evenly disperse in plastic particles, thereby enabling the PPS composite material to have high electric conductivity and meeting the requirements of industrial big production.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-conductivity polyphenylene sulfide composite material and a preparation method thereof. Background technique [0002] PPS is a thermoplastic special engineering plastic with excellent comprehensive properties. Its outstanding features are high temperature resistance, corrosion resistance, radiation resistance, non-combustibility, excellent mechanical properties and electrical properties. Mainly used in automobile manufacturing, electronic appliances, machinery industry, chemical instrumentation and aerospace industry, etc. However, PPS, like other plastics, differs from metal mainly in its insulation and dielectric properties, which limits its ability to replace metal in certain fields. With the development of industrial production and science and technology, some fields that require high conductivity of materials, such as electrical engineering, electromagnetic...

Claims

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Application Information

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IPC IPC(8): C08L81/02C08K7/06H01B1/22B29C47/40B29B9/12C08K5/56
Inventor 徐东贺永黄义宏
Owner SHENZHEN KEJU NEW MATERIAL
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