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Practical Notes on the Measurement and Interpretation of Thermally Stimulated Discharge Currents in Biaxially Oriented Polypropylene

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publicationProceedings of the 26th Nordic Insulation Symposium, NORD-IS 19
Place of PublicationNTNU, Norway
PublisherNordic Insulation Symposium
Publication statusPublished - 8 Aug 2019
Publication typeA4 Article in a conference publication
EventNordic Insulation Symposium -
Duration: 1 Jan 1900 → …

Publication series

NameProceedings of the 26th Nordic Insulation Symposium
PublisherNordic Insulation Symposium
ISSN (Electronic)2535-3969


ConferenceNordic Insulation Symposium
Period1/01/00 → …


The measurement and interpretation of high-field thermally stimulated depolarization current (TSDC) of capacitor-grade biaxially oriented polypropylene (BOPP) films are investigated in order to facilitate the derivation of trap parameters. Two main relaxations associable with the glass transition and detrapping of space charge from deep traps are observed, and their dependence on the polarization/depolarization conditions are studied. The complex bipolar nature of the space charge relaxation makes the derivation of trap parameters challenging. Lastly, a brief attempt is made to correlate the TSDC features with morphology and other short-term dielectric properties.