The Effect of Temperature on the Pulsed Electrical Strength of Polypropylene and Polycarbonate Films

The pulsed electrical strength of 2 µm thick polypropylene (PP) and 2.5 µm thick polycarbonate (PC) films was investigated under pulsed conditions. The most probable values of breakdown strengths for the thin films studied were obtained using the Weibull distribution. It is shown that within the temperature range of 293-363 K the breakdown strength of PP is practically independent of temperature and is about 500 MV/m, whereas for PC it decreases linearly from 700 MV/m to 500 MV/m.