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 polyurethane and related compounds with Co2+ (complexed and H2S-treated forms) by using thermally stimulated depolarization currents (TSDC). Four relaxation processes denoted as gamma, beta(s), beta' and beta(h) in polyurethane ionomers over the 110-370 K range were observed. Molecular origin of these processes was suggested. The effects of the hard segments content, complexation and H2S treatment on the relaxation processes were explained in terms of the structural modifications of the hard and soft microphases.