ABSTRACT
Dielectric spectroscopy has been and is being used to study multiple transitions in polymers [1,2). Liberation of motion of polar groups in the polymer chain, or attached to it, results in changes of the dielectric permittivity and loss. For usual homopolymers, copolymers, and blends, the dielectric transitions are correlated with those detected by dynamic mechanical relaxation, thermomechanical analysis (TMA), differential scanning calorimetry (DSC), electron spin resonance (ESR), and nuclear magnetic resonance (NMR) methods [3]. For ferroelectric polymeric compounds and composites this correlation is not straightforward.
