Generally, the molecular weight of industrial PVC is in the range of 50,000 ~110,000, and it has great polydispersity. The molecular weight increases with the decrease of polymerization temperature, and there is no fixed melting point. It begins to soften at 80 ~ 85℃, and 130℃ becomes viscoelastic, which is 160 ~ 180℃. It has good mechanical properties, the tensile strength is about 60MPa, and the impact strength is 5 ~ 10 kJ/m2. Has excellent dielectric properties.
PVC used to be the largest general-purpose plastic in the world, and it was widely used. 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, fibers and so on.
Polyvinyl chloride can be prepared from ethylene, chlorine and catalyst by substitution reaction. Because of its fire and heat resistance, PVC is widely used in various products: wire sheath, optical fiber sheath, shoes and so on.
Handbags, bags, ornaments, signboards and billboards, architectural decorative products, furniture, ornaments, rollers, pipes, toys, door curtains, rolling doors, auxiliary medical supplies, gloves, fresh-keeping paper for certain foods, certain fashions, etc.