Gamma radiation effects in polyethylene naphthalate - electrical properties

J.W. Mackersie, M.J. Given, S.J. MacGregor, R.A. Fouracre

Research output: Contribution to conferencePaper

6 Citations (Scopus)


Samples of polyethylene naphthalate (PEN) film, 25 mum thick, have been exposed to gamma radiation doses of 26.4kGy and 158.4kGy. The electrical properties of virgin material and material exposed to these representative doses have been examined by two methods. The first is the response of the material to the application and removal of a step voltage and the second is thermally stimulated depolarisation current (TSDC) measurements. The former provided data on both the nominal DC conductivity as a function of temperature and, by transforming the transient current results to the frequency domain, the low frequency dielectric loss behaviour - also as a function of temperature. The TSDC measurements included both global spectra and partial polarisation spectra. Both types of measurement showed significant differences in behaviour associated with ageing of the sample material. It is also shown that effects due to processes activated at higher temperatures can be initiated by polarisation at much lower temperatures.
Original languageEnglish
Number of pages4
Publication statusPublished - Oct 2001
EventAnnual Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) - Waterloo, Canada
Duration: 14 Oct 200117 Oct 2001


ConferenceAnnual Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)


  • gamma radiation
  • polyethylene
  • naphthalate
  • electrical properties


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