Abstract
Thermally stimulated depolarization currents (TSDC) in polyethylene terephthalate (Hostaphan) films of different thickness (12, 25, and 50 μm) have been investigated under different environmental conditions in the temperature range of 20-150°C. Two peaks of TSDC spectra observed at approximately 80 and 125°C originate from a dipolar process (α peak) and a space-charge relaxation (ρ peak), as evidenced from the variation of parameters such as electrode geometry and polarizing voltage. A numerical method (Tikhonov regularization procedure) has been employed to determine the most probable values of effective frequency factors of dipolar and space-charge relaxation in polyethylene terephthalate. An apparent influence of environmental pressure on the location of the α peak has been observed whose origin is yet to be determined.
Original language | English |
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Pages (from-to) | 5337-5341 |
Number of pages | 5 |
Journal | Journal of Applied Physics |
Volume | 83 |
Issue number | 10 |
DOIs | |
Publication status | Published - 15 May 1998 |