Thermally stimulated currents in ethylene-propylene rubber with fillers

Abstract

EPR polymers with fillers are being used for the insulation of medium and high voltage power cables. Although a great deal of work has been done on the electrical properties of polymers and the intact cable, there seems not to be a systematic study of the electrical properties as a function of the inorganic structural characteristic of the filler. The trapping sites of carriers in the filled polymers has been thought " to be closely related to the boundary regions between polymer and filler. Recently, several studies have been carried out on the behavior of space charges in composite polymers [1–4]. However very little work has been done on whether fillers affect the electrical properties at other than the interfacial areas. We are, at this time, reporting preliminary data on the study of the electrical properties of fillers with different structures using the TSC technique to measure the space charge characteristic.