Polymerizations of Vinyl Acetate and Vinyl Propionate and the Properties of Their Copolymer

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The polymerization reaction of vinyl propionate was compared with that of vinyl acetate. The rates of polymerization of vinyl propionate and vinyl acetate in toluene were proportional to [M] 2.3 and [M] 1.5, respectively. The corresponding initiator efficiencies were 0.79 and O.80, respectively. The chain transfer constants to monomer and to toluene were 3.6×10-4 and 1.4×10-4, respectively, for vinyl propionate 1.9×10-4 and 3.3×10-4, respectively, for vinyl acetate. The rate of emulsion polymerization of vinyl propionate was slower than that of vinyl acetate, which is due to the difference in solubilities of the monomers to water. The monomer reactivity ratios of vinyl propionate and vinyl acetate were 1.0±0.1 and 0.9±0.2, respectively. The film forming ability of the copolymer of these two monomers was better than those of the homopolymers. The mechanical properties and alkali resistance of the copolymer film were better than those of the homopolymers and the copolymer of vinyl acetate with ethyl acrylate.
Japan Society of Colour Materialの論文