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Radiation Effects on ${\gamma}$-Ray Irradiated Ethylene Propylene Rubber using Dielectric Analysis  

Kim, Ki-Yup (Korea Atomic Energy Research Institute)
Ryu, Boo-Hyung (Dept. of Safety Engineering, Dongguk University)
Lee, Chung (Dept. of Electrical Engineering, Chungbuk Nat′l University)
Lim, Kee-Joe (Dept. of Electrical Engineering, Chungbuk Nat′l University)
Publication Information
KIEE International Transactions on Electrophysics and Applications / v.3C, no.2, 2003 , pp. 48-54 More about this Journal
Abstract
To evaluate the radiation degradation of ethylene propylene rubber (EPR), radiation effects on EPR were investigated by using dielectric analysis and thermal-gravimetric analysis. Permittivity, loss factor, tan$\delta$, and thermal decomposition temperature were observed for ${\gamma}$-ray irradiated EPR. As the radiation dose was increased, the peak temperature of the loss factor and tans of EPR were increased and loss factor and tan$\delta$ at peak temperature were decreased. Activation energies were calculated using loss factor and thermal decomposition for ${\gamma}$-ray irradiated EPR as well. The trends of both calculated activation energies showed the same tendencies as radiation dose was increased.
Keywords
EPR; radiation effects; dielectric analysis; activation energy;
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