Title :
Tracking degradation and pyrolysis of EPDM insulators
Author :
Nunes, Suzana Pereira ; Costa, Ricardo Aurélio da ; Barbosa, Selma Pedro ; Almeida, Geraldo R. ; Galembeck, Fernando
Author_Institution :
Pirelli Res. Center, Santo Andre, Brazil
fDate :
2/1/1989 12:00:00 AM
Abstract :
EPDM (ethylene-propylene-diene terpolymer) rubber insulators were subjected to tracking resistance tests. Gases evolved in these tests were collected and analyzed by gas chromatography and Fourier-transform infrared spectrophotometry. Gases obtained by pyrolysis of this rubber compound (at 400, 600, 800, 1000°C) were also collected and analyzed. Comparison of the gaseous mixtures obtained in both cases revealed that they are similar: CO, CO2 ethene, and methane are their major components. Acetylene was also obtained in tracking degradation experiments, probably due to methane reactions in the high-temperature tracking plasma. These results show that pyrolysis is the major event leading to gaseous product formation in tracking degradation
Keywords :
Fourier transform spectroscopy; chromatography; infrared spectroscopy; insulation testing; organic insulating materials; polymers; pyrolysis; spectrochemical analysis; 1000 C; 400 C; 600 C; 800 C; CO; CO2; Fourier-transform infrared spectrophotometry; acetylene; ethene; ethylene-propylene-diene terpolymer; gas chromatography; high-temperature tracking plasma; insulation testing; methane; pyrolysis; rubber insulators; tracking degradation; tracking resistance tests; Electrodes; Gas insulation; Gases; Insulation life; Land surface temperature; Polymers; Rubber; Surface discharges; Thermal degradation; Thermal stresses;
Journal_Title :
Electrical Insulation, IEEE Transactions on
