Know More About PVC Materials

Polyvinyl chloride, English referred to as PVC (Polyvinyl chloride polymer = PVC molecular structure), is a vinyl chloride polymerization initiator from the role of the thermoplastic resin. Is a homopolymer of vinyl chloride. Vinyl chloride homopolymer and vinyl chloride copolymer collectively referred to as vinyl chloride resin. 

PVC amorphous white powder structure, the degree of branching smaller. Industrial production of PVC molecular weight is generally 50,000 to 120,000 range, with a larger polydispersity, molecular weight increases with decreasing polymerization temperature; no fixed melting point, 80 ~ 85 ℃ began to soften, 130 ℃ into a viscoelastic state , 160 ~ 180 ℃ began to change into a viscous flow state; have better mechanical properties, tensile strength of about 60MPa, impact strength of 5 ~ 10kJ / m2; have excellent dielectric properties. 

However, the poor stability of light and heat, at 100 ℃ or above a long time exposure to the sun, will decompose and produce hydrogen chloride, and further automatic catalytic decomposition, causing discoloration, physical and mechanical properties also decreased rapidly in practice must be added to the stability Agent to increase heat and light stability. PVC is very hard, poor solubility, only soluble in cyclohexanone, dichloroethane and a few solvents such as tetrahydrofuran, organic and inorganic acids, alkalis, salts are stable, chemical stability with the use of elevated temperature Lower. PVC is dissolved in acetone - carbon disulfide or acetone - benzene mixed solvent, used for dry spinning or wet spinning and fiber, called vinylon, with flame retardant, acid and alkali, anti-microbial, wear-resistant properties and has Better warmth and elasticity.