| Title |
A Study on the Tracking Characteristics of Silicone Rubber Degraded by Accelerated UV Exposure |
| Authors |
김숙철(Kim, Suk-Cheol) ; 이준호(Lee, Jun-Ho) ; 황보승(Hwang, Bo-Seung) ; 이동영(Lee, Dong-Yeong) ; 한민구(Han, Min-Gu) |
| Keywords |
고분자 애자 ; 실리콘 고무 ; 가속열화 ; 트래킹 ; 접초각 ; |
| Abstract |
The tracking characteristics of silicone rubber degraded by accelerated outdoor exposure employing a weather-o-meter were investigated. The tracking test was performed according to ICE Publ.587 method but the concentration of conductive solution was two times higher than IEC standard in order to accelerate the tracking failure. The number of large effective scintillation and the current of high voltage circuit were measured simultaneously. It was shown that the number of effective scintillation had valuable information of the tracking degradation state of silicone rubber, while the average current between electrodes could not provide information enough for diagnosis. Based upon the experimental results, it could be said that the key factor accelerating tracking failure was not Joule heating by current but pyrolysis by burning of silicone rubber, and that reduction of contact angle was due to chain scission which resulted in the free radicals of low molecules. |