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Curable copolymers of isobutylene and acrylic ester were successfully synthesized by incorporation of a third monomer into alternating copolymers of isobutylene and acrylic ester by means of complexed copolymerization catalysed with alkylboron halide. As the third monomer, acrylic ester including an unsaturated bond in the ester group (AEU), such as crotyl acrylate, or vinyl monomer including a chlorine...
Reactive copolymers of isobutylene and acrylic ester were successfully synthesized by the incorporation of acryloyl chloride or maleic anhydride into alternating copolymers of isobutylene and acrylic ester by means of complexed copolymerization catalysed with alkylboron halide. The terpolymers of isobutylene, acrylic ester and acryloyl chloride (AILM) and isobutylene, acrylic ester and maleic anhydride...
It was found that alkylboron halide, such as ethylboron dichloride and diethylboron chloride, was a highly active catalyst for the alternating copolymerization of isobutylene and acrylic ester. The alternating sequential structure of the resulting copolymers was proved by analysis of n.m.r. spectra. The Lewis acidity of the catalyst, the molar ratio of catalyst to acrylic ester and the molar ratio...
Alternating copolymers of isobutylene and acrylic ester (designated as AIM copolymers) were synthesized by complexed copolymerization in the presence of alkylboron halide. Various characteristic properties of the AIM copolymers were revealed. AIM copolymers showed singular properties which could not be expected from those of the corresponding homopolymers. The glass transition temperature, thermal...
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