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PVC Material

  • Author:naky
  • Source:www.diecastingpartsupplier.com
  • Release on:2014-11-19
PVC Material

PVC , which is used for Die pelakon membeli logam die cast aluminium bodyaluminium lampu jalan die casting. It is the abbreviation PVC (Polyvinyl chloride polymer = PVC molecular structure ) , is formed by the polymerization of vinyl chloride in the role of initiator of the thermoplastic resin. Is a homopolymer of vinyl chloride . Homopolymers and copolymers of vinyl chloride system called vinyl chloride resin.

PVC material as a white amorphous powder , the degree of branching is small. Industrial production PVC
molecular weight generally in the range of 50,000 to 120,000 , with a polydispersity of greater molecular weight increases with lowering the polymerization temperature ; no fixed melting point , 80 ~ 85 ℃ begins to soften , 130 ℃ into a viscoelastic state , 160 ~ 180 ℃ started to change as a viscous flow state ; have better mechanical properties, tensile strength of about 60MPa, the impact strength of 5 ~ 10kJ / m2; has excellent dielectric properties. However, poor stability to light and heat , at or above 100 ℃ after prolonged exposure to sunlight , it will decompose to produce hydrogen and further autocatalytic decomposition, cause discoloration , physical and mechanical properties are rapidly decreased in practice must be added to stabilize agents to improve the stability to heat and light .

PVC Material is very hard, very poor solubility , only a few solvent, dissolved in cyclohexanone ,
dichloroethane, tetrahydrofuran and the like , and organic and inorganic acids, bases , salts are stable, chemical stability with increased temperature reduced . PVC dissolved in acetone - carbon disulfide or acetone - benzene mixed solvent for dry spinning or wet spinning from fiber , called polyvinyl chloride , with flame retardant , acid, anti-microbial , wear, environmentally friendly features and has good thermal resistance and elasticity.