HIGH FIELD AC DISSIPATION CURRENT WAVEFORMS OF AN OXIDIZED POLYPROPYLENE FILM SUPERPOSED BY DC RAMP VOLTAGE

摘要

To investigate the AC conduction mechanisms, the dissipation current waveforms superposed by DC ramp voltage of an OPP sample were observed. The main conclusions are as follows;rn(1) At room temperature, tan δ and dissipation current waveforms did not depend on the superposed DC ramp voltage. The shapes of dissipation current waveforms were almost sinusoidal one for the oxidized polypropylene film sample.