DIELECTRIC-RELAXATION STUDIES ON POLYMERIC SALTS - POLY(METHYLMETHACRYLATE-CO-N,N-DIMETHYLAMINOPROPYL ACRYLAMIDE) BENZOIC-ACID SYSTEMS

A series of polymeric salts of p-substituted benzoic acids in methacry late-co-N,N-dimethylaminopropylacrylamide) were prepared and AC impeda nce studies of film-attached electrodes were carried out. The impedanc e curves and conductivity variation-with temperature were analysed. Th e parameter which describes the shape of the circular arcs in the impe dance curves was temperature independent, and the distribution of rela xation times remained constant during the test on the material. Furthe rmore, the ionic conductivity was highly dependent on the chemical str ucture produced by the substituted benzoic group.