ELECTRICAL PERFORMANCE OF POLYMERIC INSULATING MATERIALS UNDER ACCELERATED AGING IN A FOG CHAMBER.

R. S. Gorur, E. A. Cherney, R. Hackam, T. Orbeck

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A comparative study of the ac (60 Hz) surface aging in a fog chamber is reported on cylindrical rod samples of high temperature vulcanized (HTV) silicone rubber and ethylene propylene diene monomer (EPDM) rubber containing various amounts of alumina trihydrate (ATH) and/or silica fillers. In low conductivity (250 mu S/cm) fog, silicone rubber performed better than EPDM samples whereas in high conductivity (1000 mu S/cm) fog, the order of performance was reversed. The mechanisms by which fillers impart tracking and erosion resistance to materials is discussed as influenced by the experimental conditions of the accelerated aging tests. Surface studies by ESCA (Electron Spectroscopy for Chemical Analysis) demonstrate that the hydrophobicity of silicone rubber, despite the accumulation of surface contamination, can be attributed to migration of low molecular weight polymer chains and/or mobile fluids, such as silicone oil.

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
Place of PublicationNew York, NY, USA
PublisherIEEE
StatePublished - 1987
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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    Gorur, R. S., Cherney, E. A., Hackam, R., & Orbeck, T. (1987). ELECTRICAL PERFORMANCE OF POLYMERIC INSULATING MATERIALS UNDER ACCELERATED AGING IN A FOG CHAMBER. In Unknown Host Publication Title IEEE.