Dielectric breakdown statistics of polyethylene for progressivelycensored data

Research output: Contribution to journalConference article

Abstract

The dielectric breakdown of thin films of low-density polyethylene (LDPE) electrically aged in an aqueous solution of NaCl under an AC electric field was investigated. A two-parameter Weibull function was used for the dielectric breakdown time to failure. The probability of failure for a sample was obtained by the White method for progressively censored data. Samples aged at different temperatures were compared. The results show that initially the samples aged at lower temperature (≈25°C) are more prone to fail, while those aged at higher temperature (50°C) fail at longer times. This was attributed to a competition between oxidation and diffusion.

Original languageEnglish
Pages (from-to)602-606
Number of pages5
JournalMaterials Science Forum
Volume455-456
Publication statusPublished - 29 Jul 2004
Event2nd International Materials Symposium - Caparica, Portugal
Duration: 14 Apr 200316 Apr 2003

Keywords

  • Dielectric breakdown
  • Polyethylene
  • Power cables
  • Weibull function

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