High-strength insulating cpvc material and preparation method thereof

Abstract

The invention relates to the technical field of cpvc, in particular to a high-strength insulating cpvc material and a preparation method thereof.The high-strength insulating cpvc material is prepared from chlorinated polyvinyl chloride, coating modified carbon black, heat conduction filler, an impact modifier, a heat stabilizer, a flame retardant, an inner lubricant and an outer lubricant. Through selection of the filler and innovative combination of a modification method, synergistic toughening of an inorganic rigid body and an organic elastomer on cpvc is realized, and optimized structure adjustment is performed according to the dispersion condition of the filler, so that the cost is reduced and the insulativity is ensured while the thermal conductivity is improved; as a cable material, the material has a huge application prospect.

Description

technical field [0001] The invention relates to the technical field of CPVC, in particular to a high-strength insulating CPVC material and a preparation method thereof. Background technique [0002] As a kind of thermoplastic, polyvinyl chloride is polymerized by vinyl chloride monomer in initiator (azo compound, peroxide, etc.), under the action of light and heat according to the mechanism of free radical reaction, referred to as PVC. CPVC resin is an important modified variety of PVC resin. It is made of PVC resin through chlorination reaction. Due to the different substitution positions of chlorine atoms in the molecular chain, the distribution of chlorine atoms on the carbon chain is complicated. The structure is equivalent to the ternary random copolymer of vinyl chloride, 1,1-dichloroethylene and 1,2-dichloroethylene. The chlorine content is significantly higher than that of PVC, and the heat resistance is better. At the same time, it also has excellent mechanical pro...

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Problems solved by technology

But at the same time, in the chlorination process, in addition to the substitution reaction, some side reactions will also occur, resulting in abnormal structures such as head-head structure, unsaturated double bond structure, unstable chlorine structure, and branched chain in the CPVC molecular chain. The chlorine content makes it easier to release hydrogen chloride gas during processing, greatly reducing the thermal stability, and also greatly enhancing the force between the molecular chains of CPVC resin, so that when the material is subjected to external impact, the molecular chains are not easy to denature and absorb energy. More brittle, poor impact resistance

[0003]In addition, as a cable material, improving the thermal conductivity of cpvc materials can help improve heat dissipation performance, thereby better improving safety, but many fillers with excellent thermal conductivity are also Belongs to electrical conductors, such as carbon black, carbon fiber and carbon nanotubes, etc., and insulating and thermally conductive fillers such as silicon nitride also have the problem of high cost, and thermally conductive fillers need a large filling amount when they need to have better thermal conductivity. The mechanical properties of the material can be seriously affected

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