The electrical performance of polymeric insulating materials under accelerated aging in a fog chamber
- Univ. of Windsor, Windsor, Ontario (CA)
- Dow Corning Corp., Midland, MI (US)
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.
- OSTI ID:
- 6372185
- Journal Information:
- IEEE Trans. Power Del.; (United States), Vol. 3:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
AC SYSTEMS
ELECTRICAL INSULATION
SILICON
ELECTRICAL PROPERTIES
AGING
ELECTRON SPECTROSCOPY
EXPERIMENTAL DATA
FOG
HIGH TEMPERATURE
PERFORMANCE
SURFACE CONTAMINATION
CONTAMINATION
DATA
ELEMENTS
ENERGY SYSTEMS
INFORMATION
NUMERICAL DATA
PHYSICAL PROPERTIES
POWER SYSTEMS
SEMIMETALS
SPECTROSCOPY
200301* - Power Transmission & Distribution- AC Systems
EHV & UHV- (-1989)
200104 - Fossil-Fueled Power Plants- Components