Ethylene Vinyl Acetate Polymerization

Therefore vinyl acetate runaway polymerization incidents are very serious and they occur with a high frequency.

Ethylene vinyl acetate polymerization.

Vinyl acetate c4h6o2 cid 7904 structure chemical names physical and chemical properties classification patents literature biological activities safety. Vinyl acetate increases gas permeability impact strength crystallinity coefficient of. 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. 1 price 2 plastics polymers ethylene vinyl acetate 1 2 341 ethylene vinyl acetate a k a.

Ethylene vinyl acetate solution polymerization. It can be polymerized to give polyvinyl acetate pva. 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. The polymerization of vinyl acetate is probably the second most frequent cause of runaway reaction accidents in the chemical industry after the phenol formaldehyde runaway reaction.

The polymerization process is hazardous because of its high thermal runaway risks 5 6 and the bulk polymerization is most harzardous among which due to the lack of solvent to dilute the heat released in polymerization. The polymerizations of vinyl acetate and ethylene caused many thermal runway accidents because of the high exothermicity. Eva properties vary depending on the comonomers contents. There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used.

Vae polymerization utilizes high pressure reactions ranging between 200 and 2000. The va comonomer interferes with chain packing reducing crystallinity and thus lowering t m and improving transparency when compared with ldpe. Highly effective organometallic mediated radical polymerization of vinyl acetate using alumina supported co acac 2 catalyst. Journal of applied polymer science 2018 135 13 46057.

Eva is the copolymer of ethylene and vinyl acetate. A case study of adsorption and polymerization. Ethylene vinyl acetate eva is a random copolymer of ethylene and varying amounts of vinyl acetate va. Emblem in packaging technology 2012.

As the va content increases crystallinity decreases until at 50 the eva is.