Effect of gamma-ray irradiation on the TSC in polyethersulfone

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

doi:10.1109/94.654688

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

Kagami Memorial Research Institute for Materials Science and Technology

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	732-737
Number of pages	6
Journal	IEEE Transactions on Dielectrics and Electrical Insulation
Volume	4
Issue number	6
DOIs	https://doi.org/10.1109/94.654688
Publication status	Published - 1997

ASJC Scopus subject areas

Electrical and Electronic Engineering

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title = "Effect of gamma-ray irradiation on the TSC in polyethersulfone",

abstract = "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.",

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T1 - Effect of gamma-ray irradiation on the TSC in polyethersulfone

AU - Kim, E. J.

AU - Kato, G.

AU - Ohara, T.

AU - Ohki, Y.

AU - Li, S. T.

PY - 1997

Y1 - 1997

N2 - 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.

AB - 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.

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Effect of gamma-ray irradiation on the TSC in polyethersulfone

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