Alpha relaxation study in poly(vinyl chloride)/poly(ethyl methacrylate) blends using thermally stimulated currents

Thermoelectrets of poly(vinyl chloride) (PVC) and poly(ethyl methacrylate) (PEMA) blends were prepared using the conventional thermal poling method. α‐Relaxation in this polyblend was investigated using thermally stimulated depolarization currents (TSDC). The global spectra of the polyblends revealed that the two polymers are not completely compatible. An Eyring relationship was verified through the linear relation between the activation enthalpy ΔH and the activation entropy ΔS. In addition, the thermal sampling (TS) data were used to determine the compensation parameters such as compensation temperature Tc and compensation time (τc). These parameters were used to calculate the density of disorder (DOD) for all samples, which was found to be close to 32%. © 2000 Society of Chemical Industry