Effect of gamma-ray irradiation on the TSC in polyethersulfone

E. J. Kim*, G. Kato, T. Ohara, Y. Ohki, S. T. Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


When polyethersulfone was irradiated by γ rays and then poled at 37°C, a new TSC (thermally stimulated current) peak appeared at ∼100°C. This new peak and other peaks near 40 and 150°C increase with an increase in dose of ∼0.6 kGy, and this is considered to be due to trapped charges and other ionic carriers becoming mobile when rearrangement of scissioned chains occurs. However, if the dose exceeds 0.6 kGy, the peak magnitude decreases. Furthermore, if the TSC was poled at 120°C, only the peak near 150°C appeared and this peak monotonically decreased with an increase in the irradiation dose. A similar decreasing tendency was also observed in the conduction current and in the residual voltage. These decreasing features are considered to be caused by the radiation-induced change that rearrangement of scissioned chains decreases free volume for ionic transport.

Original languageEnglish
Pages (from-to)732-737
Number of pages6
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Issue number6
Publication statusPublished - 1997

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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