Light-sensitive elastomers modified by 4-(N-dimethylmaleimido)-benzenesulphenyl chloride |
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Authors: | Joseph Berger |
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Affiliation: | CIBA-GEIGY AG, Central Research Laboratories, Basle, Switzerland |
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Abstract: | New light-sensitive polymers were prepared by modification of four different elastomers with 4-(N-dimethylmaleimido)-benzenesulphenyl chloride (DMI-BSCI). Polydienes modified by DMI-BSCI form block copolymers. These polymers show a strong increase of the glass transition temperature Tg whereby the Tg increase of modified poly(octenamer) is much smaller. Higher modified polydienes have two Tg. Modified poly(octenamers) show a melting temperature dependence Tm on the content of trans double bonds which is characteristic of statistical copolymers. The ratio of rate constants with which trans- and cis-structures in poly(octenamer) are occupied by DMI-BSCI, is |
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Keywords: | unsaturated light-sensitive polymers elastomers dimethylmaleimide side groups sulphenyl chloride glass transition temperature melting temperature |
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