PVC,also called Polyvinyl chloride, is a polymer formed by polymerization of vinyl chloride monomer (VCM) in peroxide, azo compound and other initiators or under the action of light and heat according to the mechanism of free radical polymerization. . Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins.
PVC is a white powder with an amorphous structure, with a small degree of branching, a glass transition temperature of 77-90°C, and begins to decompose at around 170°C [1]. It has poor stability to light and heat. , it will be decomposed to produce hydrogen chloride, and further autocatalytic decomposition will cause discoloration and rapid decline in physical and mechanical properties. In practical applications, stabilizers must be added to improve the stability to heat and light.
PVC is one of the most widely used general-purpose plastics in the world. It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, Fiber and other aspects are widely used.
Post time: Mar-24-2023