Polymerization Of Ethylene Vinyl Acetate

Eva copolymers are commercially used predominantly in the areas of coating laminating and in the film industries.

Polymerization of ethylene vinyl acetate. Eva polymer milk ethylene vinyl acetate eva also known as poly ethylene vinyl acetate peva is the copolymer of ethylene and vinyl acetate. Eva generally contains 1 50 of the va comonomer along the carbon chain backbone. The weight percent of vinyl acetate usually varies from 10 to 40 with the remainder being ethylene. 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.

Monomer partitioning and preliminary modelling. 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. It can be polymerized to give polyvinyl acetate pva.

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. Coordination copolymerization of vinyl acetate vac with ethylene leading to linear copolymers that possess in chain ch 2 ch oac units has been accomplished using novel palladium complexes bearing alkylphosphine sulfonate ligands. The copolymerization by itp itcop of ethylene with vinyl acetate vac to form poly ethylene co vinyl acetate eva copolymer was also successful. 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.

Ethylene vinyl acetate emulsion copolymerization.