| Customization: | Available |
|---|---|
| Condition: | New |
| Automation: | Automatic, Automation |
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Polyvinyl chloride, or PVC for short in English, is a polymer of vinyl chloride monomer (VCM) in peroxide, azo compounds and other initiators or under the action of light and heat according to free radical polymerization reaction mechanism. Vinyl chloride homopolymer and vinyl chloride copolymer are called vinyl chloride resin.
PVC is amorphous structure of white powder, branching degree is small, glass temperature 77~90ºC, 170ºC or so began to decompose, the stability of light and heat is poor, above 100ºC or after a long time of sunlight exposure, it will decompose and produce hydrogen chloride, and further automatic catalytic decomposition, cause discoloration, physical and mechanical properties also rapidly decline, In practical application, it is necessary to add stabilizer to improve the stability of heat and light.
PVC molecular weight of industrial production is generally in the range of 50,000 ~ 110,000, with large polydispersion, molecular weight increases with the decrease of polymerization temperature, there is no fixed melting point, 80 ~ 85ºC began to soften, 130ºC into viscoelastic state, 160 ~ 180ºC began to change into viscoelastic state; Good mechanical properties, tensile strength about 60MPa, impact strength 5 ~ 10kJ/m2; It has excellent dielectric properties.
PVC used to be the world's largest production of general purpose plastic, very widely used. It is widely used in construction materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipe, wire and cable, packaging film, bottles, foam materials, sealing materials, fibers and other aspects
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