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Preparation method of PPS (Polyphenylene Sulfide) composite resistor

A composite resistor and mixed resin technology, applied in the field of resistor material manufacturing, can solve the problems of low stability, general electrical conductivity, and inability to meet the needs of overcurrent protection.

Inactive Publication Date: 2017-12-22
SUZHOU NANER MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing PTC components using carbon black, graphite, carbon fiber, etc. as non-conductive fillers usually have an internal resistance of tens of milliohms, which cannot meet the increasing demand for overcurrent protection
Using conductive ceramic materials such as titanium carbide, its thermal conductivity is high, but its electrical conductivity is average, and it also has the problem of low stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 8 parts by weight of polyethylene into a three-necked flask with a thermometer and a reflux device, place the flask in an oil bath, control the temperature at 85°C, add 5 parts by weight of maleic anhydride to the flask, stir for 1 hour, and then Add 0.3 parts by weight of dicumyl peroxide and 0.2 parts by weight of dibutyltin dilaurate in sequence, and stir for 3 hours to obtain maleic anhydride-grafted polyethylene for later use.

[0020] Weigh 10 parts by weight of polyphenylene sulfide into a three-necked flask equipped with a thermometer and a reflux device, place the three-necked flask in a digital constant temperature electric heating mantle, control the temperature at 280°C, stir for 2 hours, and then add 6-8 wt. One part of the above-mentioned maleic anhydride-grafted polyethylene was stirred for 10 minutes, and then 0.3 parts by weight of potassium persulfate was added, and stirred and reacted for 3 hours to obtain a PPS mixed resin.

[0021] Ingredients...

Embodiment 2

[0030] Weigh 15 parts by weight of polyethylene into a three-necked flask with a thermometer and a reflux device, place the flask in an oil bath, control the temperature at 95°C, add 10 parts by weight of maleic anhydride to the flask, stir for 2 hours, and then Add 0.5 parts by weight of dicumyl peroxide and 0.4 parts by weight of dibutyltin dilaurate in sequence, and stir for 4 hours to obtain maleic anhydride-grafted polyethylene for later use.

[0031] Weigh 15 parts by weight of polyphenylene sulfide into a three-necked flask equipped with a thermometer and a reflux device, place the three-necked flask in a digital constant temperature electric heating mantle, control the temperature at 300°C, stir for 3 hours, and then add 8 parts by weight of the above-mentioned Maleic anhydride is grafted to polyethylene, stirred for 20 minutes, and then 0.5 parts by weight of potassium persulfate is added, stirred and reacted for 4 hours to obtain a PPS mixed resin.

[0032] Ingredien...

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PUM

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Abstract

The invention discloses a preparation method of a PPS (Polyphenylene Sulfide) composite resistor. A product obtained by the preparation method contains a PPS composite material and has relatively high electric conductivity; the electrical resistivity is still stable in a high-temperature environment and a humid environment. According to the PPS composite resistor, ingredients are adjusted and nano carbon fibers are added and used as conductive filler, so that the electrical conducting property of the composite resistor is enhanced and the heat-conducting property and the mechanical property can also be enhanced; the service life of the composite resistor is prolonged.

Description

technical field [0001] The invention relates to the field of resistance material manufacture, in particular to a preparation method of PPS composite resistance. Background technique [0002] Polyphenylene sulfide (PPS) is a new type of special engineering plastic with superior performance successfully developed by the American Phillips Petroleum Petroleum Company in 1968. In the past 10 years, PPS has become the fastest-growing variety among engineering plastics, and is known as "the new type of plastic used in the jet age". PPS has excellent heat resistance, corrosion resistance, flame retardancy, rigidity and electrical properties, as well as good self-lubricating effect and certain load-carrying capacity. Its biggest advantage is that it can be combined with different fillers or different substrates. Under processing conditions, special treatment methods are used to meet specific use requirements. At present, it is the thermoplastic material with the lowest price and ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08L51/06C08K13/06C08K9/12C08K3/34C08K3/22
CPCC08L81/02C08K2003/221C08K2003/2227C08K2003/2241C08K2201/001C08K2201/011C08L2203/20C08L51/06C08K13/06C08K9/12C08K3/34C08K3/22
Inventor 不公告发明人
Owner SUZHOU NANER MATERIAL TECH CO LTD