Polyethylene Vinyl Chloride

In practice however vinyl chloride polymerized commercially does not have regular tacticity because the growing end of the chain is a free radical at an sp 2 hybridized carbon.

Polyethylene vinyl chloride. Rigid sometimes abbreviated as rpvc and flexible. Vinyl chloride is a colorless gas that burns easily. Ethylene vinyl acetate eva also known as poly ethylene vinyl acetate peva is the copolymer of ethylene and vinyl acetate the weight percent of vinyl acetate usually varies from 10 to 40 with the remainder being ethylene. It does not occur naturally and must be produced industrially for its commercial uses.

Vinyl chloride is used primarily to make polyvinyl chloride pvc. What is vinyl chloride. Since vinyl chloride is a monosubstituted ethylene and not a symmetric molecule in principle it could have explicit tacticity as does for example polypropylene. Pvc is the world s third most widely produced synthetic plastic polymer after polyethylene and polypropylene about 40 million tons of pvc are produced each year.

There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used. Vinyl chloride ch 2 chcl also known as chloroethylene is most often obtained by reacting ethylene with oxygen and hydrogen chloride over a copper catalyst it is a toxic and carcinogenic gas that is handled under special protective procedures. Pvc comes in two basic forms. About 13 billion kilograms are produced annually.