On the nature of thermally stimulated discharge current spectra in polyethylene terephthalate

Yu Gorokhovatsky, D. Temnov, J. N. Marat-Mendes, C. J. M. Dias, Dilip K. Das-Gupta

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

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 languageEnglish
Pages (from-to)5337-5341
Number of pages5
JournalJournal Of Applied Physics
Volume83
Issue number10
DOIs
Publication statusPublished - 15 May 1998

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