Multiple dielectric relaxation in non-crystalline polymers

This investigation is part of a larger program designed to clarify the molecular motions responsible for dielectric relaxation in polymers. It has been repeatedly observed that, in polar polymers, at least one and in general two or more relaxation processes are observed. In general a relaxation process is observed above the glass transformation temperature which is undoubtedly associated with the molecular motions which are "frozen" below this transformation. These motions are of the type associated with diffusion, i.e. motions of large segments or whole molecules involving translation and rotation.