Preparation of Block Copolymers of Vinyl Acetate in. Viscous Poor Solvents

Preparation of Block Copolymers of Vinyl Acetate in. Viscous Poor Solvents

Stable macroradicals of poly(vinyl acetate) were produced by heating vinyl acetate (VAC) and 2% tert-butyl peroxypivalate at 50° C for 96 hr in silicone oil. Block copolymers were produced from these macroradicals by adding a second vinyl monomer and heating at 50° C for an additional 72 hr. The for...

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Veröffentlicht in:Journal of macromolecular science. Chemistry 1977-01, Vol.11 (1), p.53-64
Hauptverfasser: Seymour, Raymond B., Stahl, G. Allan
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Stahl, G. Allan
description Stable macroradicals of poly(vinyl acetate) were produced by heating vinyl acetate (VAC) and 2% tert-butyl peroxypivalate at 50° C for 96 hr in silicone oil. Block copolymers were produced from these macroradicals by adding a second vinyl monomer and heating at 50° C for an additional 72 hr. The formation of these macroradicals was monitored by yield, dilatometric rate data, and scanning electron micrographs. Poly(vinyl acetate-b-methyl methacrylate), polyvinyl acetate-b-acrylic acid), polyvinyl acetate-b-acrylonitrile), poly(vinyl acetate-b-vinylpyrrolidone), poly(vinyl acetate-b-styrene), and polyvinyl acetate-b-methyl methacrylate-b-styrene) were characterized by yield, selective precipitation, pyrolysis gas chromatograph, and differential scanning calorimetry (DSC).
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title Preparation of Block Copolymers of Vinyl Acetate in. Viscous Poor Solvents
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