Tracking Degradation and Pyrolysis of EPDM Insulators

Suzana Nunes, Ricardo Aurélio da Costa, Selma Pedro Barbosa, Geraldo R. Almeida, Fernando Galembeck

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


EPDM 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, and 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.

Original languageEnglish (US)
Pages (from-to)99-105
Number of pages7
JournalIEEE Transactions on Electrical Insulation
Issue number1
StatePublished - Jan 1 1989

ASJC Scopus subject areas

  • Engineering(all)
  • Electrical and Electronic Engineering


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