Introduction of materials：
1. Chemical structure:
2. Key properties:
- Polyvinyl chloride, abbreviation PVC (Polyvinyl chloride), is the vinyl chloride monomer (VCM) in the peroxide, azo compounds and other initiators;Or under the action of light and heat according to the free radical polymerization reaction mechanism of polymer.Vinyl chloride homopolymer and polyvinyl chloride copolymer are collectively called polyethylene resins.
- PVC for amorphous structure of white powder, branched degree is small, relative density 1.4, glass transition temperature from 77 to 90 ℃, 170 ℃ or so began to decompose, poor stability to heat and light, in more than 100 ℃ or the sun for a long time, will decompose and produce hydrogen chloride, and further automatic catalytic decomposition, cause discoloration, physical and mechanical properties also fell rapidly, must be added in the practical application of stabilizers in order to improve the stability of heat and light.
- The molecular weight of PVC produced by industry is generally in the range of 50,000 to 110,000, with greater polydispersity, and the molecular weight increases with the decrease of polymerization temperature.There is no fixed melting point, softening at 80 to 85℃, viscoelastic state at 130℃, and viscoelastic state at 160 to 180℃.It has good mechanical properties, the tensile strength is about 60MPa, the impact strength is 5~ 10KJ /m2;It has excellent dielectric properties.
- PVC used to be the most versatile plastic in the world, and it is widely used.It is widely used in building materials, industrial products, daily necessities, floor leather, floor tile, artificial leather, pipe, wire and cable, packaging film, bottle, foaming material, sealing material, fiber and other aspects.