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Variations of the Electrical Treeing and Breakdown Characteristics on LDPE Due to Gamma-ray Irradiation  

Lee, Chung (TQQM Bureau, HRD Service of Korea)
Ryu, Boo-Hyung (Department of Safety & Environment Engineering, Dongguk University)
Publication Information
International Journal of Safety / v.8, no.1, 2009 , pp. 14-17 More about this Journal
Abstract
The $Co^{60}$ $\gamma$-ray irradiation effects on the electrical and thermal characteristics of low density polyethylene crosslinked by Dicumyl peroxide (DCP) were investigated. We experimented on electrical properties as following; electrical tree inception and growing type for applying AC step voltage, AC breakdown strength, volume resistivity with increasing dosage. Also, chemical analyses were performed TGA, gel fraction. These electrical properties changed depending upon its crosslinking degree and byproducts from crosslinking reactions. Crosslinking reactions were considered causing by $\gamma$-ray irradiation and DCP had contained in low density polyethylene.
Keywords
LDPE; irradiation effects; electrical tree inception; AC breakdown strength;
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