Negative temperature coefficient polymer composite material for temperature sensing cable and preparation method

Abstract

The invention relates to a negative temperature coefficient polymer composite material for temperature sensing cables and a preparation method, belonging to the field of the preparation of macromolecule functional composite material and process technology of polymers; the invention has the characteristics that: rubber or thermoplastic elastomers are combined with different auxiliary polymers, conducting particles are added to prepare the macromolecule composite material with the characteristic of negative temperature coefficient. The material has the characteristics that the resistance changeis low below the room temperature and operating temperature, and then is rapidly reduced after reaching the operating temperature, and overcomes the disadvantages that the traditional NTC macromolecule composite material has obvious resistance change below the room temperature and the operating temperature, and the resistance change is low close to the operating temperature, so as to lead the prepared temperature sensing cables to have high sensitivity, to have little effect to environment temperature and good repetitiveness.

Description

technical field [0001] The invention relates to a negative temperature coefficient of resistance polymer composite material and a preparation method thereof, in particular to a negative temperature coefficient of resistance (NTC) polymer composite material and a preparation method thereof for analog measuring line type temperature-sensing cables, belonging to polymer function Composite material preparation and polymer processing technology field. [0002] Add conductive particles to the polymer matrix to prepare polymer composite materials with NTC (negative temperature coefficient) effect, and use them in the preparation of analog linear temperature-sensing cables, mainly involving the preparation of polymer functional composite materials and polymer processing fields . Background technique [0003] At present, analog linear temperature-sensing cables are mainly prepared based on NTC polymer composite materials. Such temperature-sensing cables generally have two types of ...

AI Technical Summary

Problems solved by technology

This type of temperature-sensing cable has the advantages of being less affected by the ambient temperature and sensitive to the alarm, but the repeatability is poor or basically not reusable

Traditional polymer composites with negative temperature coefficient of resistance often have a large change in resistance at room temperature and before the operating temperature, while the resistance change is small near the operating temperature. The temperature-sensing cable made of traditional NTC polymer composites is less affected by the ambient temperature. Large, the alarm is not sensitive

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