The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
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Aging and Recovery of HTV Silicone Rubber Used for Outdoor Insulator

옥외용 HTV 실리콘고무 절연재료의 열화 및 회복특성

  • Yeon, Bok-Hui (Dept.of Electronics Engineering, Inha University) ;
  • Heo, Chang-Su (Dept.of Electronics Engineering, Inha University) ;
  • Jo, Han-Gu (Korea Electrotechnology Research Institute)
  • Published : 2002.10.01
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Abstract

This paper presents a study on the aging and recovery of HTV (high temperature vulcanized) silicone rubber used for outdoor insulators. UV irradiation, corona discharge and water immersion were employed as factors of the artificial aging. The effects of changes derived from these stresses on the tracking and arc resistance of silicone rubber were examined. We have investigated the aging phenomena of HTV silicone rubber by the above stresses using the surface energy calculation with contact angle measurement, solvent-extraction, and surface/volume resistivity and so on. These results showed that UV irradiation and corona discharge lead to nearly the same surface oxidation, but the percentage change of mobile low molecular weight by these stresses was different. Furthermore, the oxidized layer induced under UV irradiation restricted the recovery of hydrophobic surface. Water immersion little lowered hydrophobicity level and leaded to a loss of tracking and arc resistance. The degradation mechanism based on our results was discussed.

Keywords

References

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