Abstract
It has been found in previous papers that vinyloxytrimethylsilane (VOSi) showed a polymerization behavior similar to vinyl ether. In the present paper, a detailed comparisonof reactivity in radical copolymerization between VOSi and vinyl isobutyl ether (VIBE) has been undertaken. Their copolymerization with acrylonitrile, methacrylonitrile, vinyl acetate, and methyl methacrylate gave monomer reactivity ratios, which showed noappreciable difference between the two monomers. The following Q and e values wereobtained,
VOSi: Q=0.018, e=-2.39, VIBE: Q=0.019, e=-2.11The inductive effect of the trimethylsilyl group is electron-releasing. This effect is consideredto be compensated with an electron-attractive effect of Si→O partial double bond, resulting in no appreciable difference in reactivity from vinyl ether.
