Polymerization Of Ethylene Vinyl Acetate

The ethylene copolymerization by itp itcop with vinyl acetate allowed to form a broad range of poly ethylene co vinyl acetate eva containing from 0 to 85 mol of vac unit.

Polymerization of ethylene vinyl acetate.

Ethylene vinyl acetate emulsion copolymerization. Vinyl acetate c4h6o2 cid 7904 structure chemical names physical and chemical properties classification patents literature biological activities safety. Eva copolymers are commercially used predominantly in the areas of coating laminating and in the film industries. The evoh copolymer is an excellent oxygen barrier due to its recyclability and transparent nature which makes it an ideal film for food packaging 1 2.

The ethylene vinyl acetate eva copolymer can be prepared by copolymeriztion of ethylene and vinyl acetate then alcoholized to form ethylene vinyl alcohol evoh copolymer. Eva is a copolymer of ethylene and vinyl acetate va segments typically formed via free radical polymerization. By fine tuning the ethylene pressure and the vinyl acetate content a broad range of copolymers containing from 0 to 85 mol of vac unit was achieved. The bulk polymerization of vinyl acetate is extremely violent and may generate a pressure surge to above 40 bar a pressure exceeding most storage vessels pressure resistance.

Monomer partitioning and preliminary modelling. Eva polymer milk ethylene vinyl acetate eva also known as poly ethylene vinyl acetate peva is the copolymer of ethylene and vinyl acetate. With other monomers it can be used to prepare various copolymers such as ethylene vinyl acetate eva vinyl acetate acrylic acid va aa polyvinyl chloride acetate pvca and polyvinylpyrrolidone vp va copolymer used in hair gels. It can be polymerized to give polyvinyl acetate pva.

The weight percent of vinyl acetate usually varies from 10 to 40 with the remainder being ethylene.