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PVC editor PVC generally refers to PVC.

Polyvinyl chloride (PVC), referred to as PVC (Polyvinyl chloride polymer =PVC molecular structure), is a thermoplastic resin polymerized by vinyl chloride under the action of initiator.

It is a homopolymer of vinyl chloride.

Vinyl chloride homopolymer and vinyl chloride copolymer are collectively referred to as vinyl chloride resin.

PVC is amorphous powder with less branching degree.

The molecular weight of PVC in industrial production ranges from 50 thousand to 120 thousand, and has large polydispersity. The molecular weight increases with the decrease of polymerization temperature. Without fixed melting point, it begins to soften at 80~85 degrees, becomes viscoelastic state at 130, and begins to change to viscous flow at 160~180. It has better mechanical properties, tensile strength of 60MPa, impact strength 5 ~ 10kJ/m2, and excellent dielectric properties.

But the stability of light and heat is poor. At 100 degrees centigrade or long sunshine, hydrogen chloride will be decomposed, and it will be decomposed automatically, cause discoloration, and the physical and mechanical properties also decrease rapidly. In practical application, stabilizers must be added to improve the stability of heat and light.

PVC is very hard, and its solubility is very poor. It can only be dissolved in a few solvents such as cyclohexanone, two chloroethane and tetrahydrofuran. It is stable to organic and inorganic acids, bases and salts. The chemical stability decreases with the increase of temperature.

PVC is dissolved in acetone carbon disulfide or acetone benzene mixed solvent. It is used for dry spinning or wet spinning. It is called flame retardant, acid resistant, alkali resistant, anti microbial and wear-resistant, and has good thermal and elastic properties.