Title :
Diffusion of low molecular weight siloxane from bulk to surface
Author :
Homma, H. ; Kuroyagi, T. ; Izumi, Kiyotaka ; Mirley, C.L. ; Ronzello, J. ; Boggs, S.A.
Author_Institution :
Dept. of Electr. Eng., Electr. Power Dev. Co. Ltd., Kanagawa, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
Silicone-based materials for outdoor insulators have the advantage that low molecular weight (LMW) components migrate through the material and coat the surface, thereby restoring hydrophobicity over a period of hours. By measuring the IR absorption of siloxane migrating to the silicone surface through a thin carbon coating, the time constant for migration was calculated. According to the time dependence of IR-absorbance, the time constant for migration ranged from 1.6 to 5.3 h depending on alumina trihydrate (ATH) filler concentration
Keywords :
insulator testing; leakage currents; reliability; silicone rubber insulators; 1.6 to 5.3 h; IR absorption; filler concentration; hydrophobicity; low molecular weight siloxane; migration; outdoor insulators; silicone-based materials; time constant; Chemicals; Coatings; Dielectrics and electrical insulation; Leakage current; Pollution measurement; Polymers; Spine; Surface contamination; Surface resistance; Temperature;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
