What is PVC? Polyvinyl chloride (PVC), PVC (PolyvinylChloride) is a vinyl chloride monomer (vinyl chloride monomer,)VCM) is an initiator, such as peroxide or azo compound, or polymer under the action of light and heat in the polymerization mechanism of radical polymerization. Vinyl chloride homopolymer and vinyl chloride copolymer are collectively known as vinyl chloride resins. The molecular weight of PVC in industrial production in 50 thousand ~ 110 thousand range, with larger polydispersity of molecular weight increases with the decrease of the polymerization temperature; no fixed melting point, 80 to 85 DEG C for 130 to soften the viscoelastic state, 160 to 180 DEG C began to change into the viscous flow with good mechanical properties; the tensile strength of about 60MPa, the impact strength of 5 ~ 10kJ/m2; have excellent dielectric properties. PVC has been the world's largest production of universal plastics, with a wide range of applications. It has been widely applied in building materials, industrial products, daily necessities, flooring, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials and fibers.