DIELECTRIC-RELAXATION PROPERTIES OF FILLED ETHYLENE-PROPYLENE RUBBER

Thermally stimulated discharge currents and time domain dielectric spe ctroscopy were employed to characterize the behavior of clay-filled et hylene propylene rubber. Measurements were made on samples with differ ent clay concentrations and particle sizes. The main effect of the cla y filler on the electrical properties is on interfacial polarization w hich occurs at the clay polymer interface. The experimental results ar e sensitive to the shape of the clay particles. A few results indicate that other mechanisms also affect the electrical behavior of this mat erial.