Polyvinyl Alcohol Derived from Vinyl Acetate-Vinyl Benzoate Copolymer

study of ethylene/vinyl acetate transformation to ethylene/vinyl alcohol copolymer by nmr and dsc

hydrolysis of ethylene-vinyl acetate copolymer in alkaline conditions using two systems of naoh/methanol and koh/isopropanol has been studied and the formation of ethylene-vinyl alcohol copolymer was systematically examined using nmr spectroscopy and dsc measurements. vinyl acetate weight percentage and the degree of hydrolysis were calculated from nmr spectroscopy and it is shown that hydrolys...

Vinyl Acetate

Characteristics of ethylene vinyl alcohol copolymer (EVAL) mixtures.

PURPOSE To determine physical characteristics of mixtures of ethylene vinyl alcohol copolymer (EVAL) and metrizamide dissolved in dimethyl sulfoxide, liquid materials developed for embolization of arteriovenous malformations. METHODS EVAL and dimethyl sulfoxide were mixed in various proportions and sterilized. The viscosity and density of each mixture was measured. Precipitation times were de...

Graft Polymerization of Vinyl Acetate onto Starch. Saponification to Starch-g-Poly(vinyl Alcohol)

Graft polymerizations of vinyl acetate onto granular corn starch were initiated by cobalt-60 irradiation of starch-monomer-water mixtures. and ungrafted poly(vinyl acetate) was separated from the graft copolymer by benzene extraction. Conversions of monomer to polymer were quantitative at a radiation dose of 1.0 IvIrad. However, over half of the polymer was present as ungrafted poly(vinyl aceta...

Pulmonary Manfesfafons of Vinyl and Polyvinyl Chloride

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