Ethylene Vinyl Acetate Reactivity

2 maleic anhydride grafted ethylene vinyl acetate copolymers cas reg.

Ethylene vinyl acetate reactivity.

Vinyl acetate c4h6o2 cid 7904 structure chemical names physical and chemical properties classification patents literature biological activities safety. The food and drug administration fda has stated that ethylene vinyl acetate is safe when used in food production packaging or transportation and it s not an especially dangerous material. Ethylene vinyl acetate eva is a random copolymer of ethylene and varying amounts of vinyl acetate va. Vinyl acetate is the acetate ester of vinyl alcohol.

The reactivity of the two monomers is almost similar so that they are statistically distributed throughout the copolymer chain which is perfect for rubber applications. The major industrial route involves the reaction of ethylene and acetic acid with oxygen in the presence of a palladium catalyst. The true values of the monomer reactivity ratios were 0 028 3 2 10 3 for vinyl acetate and 6 219 3 1 10 1 for butyl acrylate and these were in agreement with those reported in the. Reactivity of orevac terpolymer towards pa provides good adhesion.

28064 24 6 consist of basic resins produced by the catalytic copolymerization of ethylene and vinyl acetate followed by reaction with maleic anhydride. Food contact and polyethylene or ethylene vinyl acetate copolymers as the external layer. Orevac terpolymers improve the flexibility of eva based structures. 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.

Reacts with oxygen to form explosive peroxides. Undergoes violent or explosive reactions with 2 aminoethanol chlorosulfonic acid ethylenediamine mineral acids hydrochloric acid hydrofluoric acid nitric acid sulfuric acid oleum and peroxides lewis 3rd ed 1993 p. The va comonomer interferes with chain packing reducing crystallinity and thus lowering t m and improving transparency when compared with ldpe. Since vinyl alcohol is highly unstable with respect to acetaldehyde the preparation of vinyl acetate is more complex than the synthesis of other acetate esters.

As the va content increases crystallinity decreases until at 50 the eva is. Forms explosive vinyl acetate ozonide on contact with ozone. Orevac terpolymers give the best properties to combine these materials. Orevac t 9314 9318 tubes.

Ethylene vinyl acetate is a type of plastic a polymer with a wide variety of uses both residential and industrial.