Peak shift due to the electric field on PETP corona charged foils

Abstract

Annealed PETP (polyethylene terephthalate) samples which are corona charged give only one open-circuit current peak on heating from room temperature, the thermograms being independent of the polarity and metal electrodes. However, the peak shifts to a lower temperature for increasing initial potential. These results indicate that an electric-field-activated conductivity is at work. Frozen free-volume charges may explain higher currents observed on the low-temperature part of the thermogram.<>