DocumentCode :
1300170
Title :
Effect of gamma-ray irradiation on the TSC in polyethersulfone
Author :
Kim, E.J. ; Kato, G. ; Ohara, T. ; Ohki, Y. ; Li, S.T.
Author_Institution :
Dept. of Electr. Electron. & Comput. Eng., Waseda Univ., Tokyo, Japan
Volume :
4
Issue :
6
fYear :
1997
fDate :
12/1/1997 12:00:00 AM
Firstpage :
732
Lastpage :
737
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
Keywords :
gamma-ray effects; organic insulating materials; polymers; thermally stimulated currents; 120 C; 37 C; TSC; conduction current; free volume; gamma-ray irradiation; ionic transport; poling; polyethersulfone; residual voltage; scissioned chains; thermally stimulated current; trapped charges; Dielectrics and electrical insulation; Electrodes; Heating; Mechanical factors; Plastic insulation; Polymers; Pulse measurements; Space charge; Temperature distribution; Voltage;
fLanguage :
English
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
Publisher :
ieee
ISSN :
1070-9878
Type :
jour
DOI :
10.1109/94.654688
Filename :
654688
Link To Document :
بازگشت