Influence of chain length on the molecular dynamics of an aliphatic ionene

An aliphatic random copolymer ionene (a cationic polyelectrolyte with N+ in the repeat unit), was fractionated with the continuous polymer fractionati on and investigated for its molecular weight dependent properties. The frac tions were analyzed with GPC and capillary viscometry for their molecular w eight. Glass transition temperatures were determined with DSC and a strong molecular weight dependence was observed, but no influence in the ionic con ductivity was observed. The temperature dependency of ionic conductivity in ionenes is described.