SULFOBETAINE POLYURETHANE IONOMERS .2. DIELECTRIC-RELAXATION IN POLYETHER-BASED POLYMER AND RELATED-COMPOUNDS WITH CO2+

Dielectric relaxation processes in sulfobetaine polyurethane ionomers based on polyether, were studied comparatively to nonionic polyurethan e and related compounds with Co2+ (complexed and H2S-treated forms) by using thermally stimulated depolarization currents (TSDC). Four relax ation processes denoted as gamma, beta(s), beta' and beta(h) in polyur ethane ionomers over the 110-370 K range were observed. Molecular orig in of these processes was suggested. The effects of the hard segments content, complexation and H2S treatment on the relaxation processes we re explained in terms of the structural modifications of the hard and soft microphases.