Partial discharge degradation of several biodegradable polymers

Norikazu Fuse, Shinjiro Fujita, Naoshi Hirai, Toshikatsu Tanaka, Masahiro Kozako, Masanori Kohtoh, Shigemitsu Okabe, Yoshimichi Ohki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Partial discharge (PD) resistance was examined by applying a constant voltage for four kinds of biodegradable polymers, i.e. poly-L-lactic acid (PLLA), polyethylene terephthalate succinate (PETS), poly ε-caprolactone butylene succinate (PCL-BS), and polybutylene succinate (PBS), and the results were compared with those of low density polyethylene (LDPE) and crosslinked low density polyethylene (XLPE). The PD resistance is determined by the erosion depth and the surface roughness caused by PDs, and is ranked as LDPE ≅ XLPE > PLLA ≅ PETS > PBS > PCL-BS. This means that the sample with a lower permittivity has better PD resistance. Furthermore, observations of the sample surface by a polarization microscope and a laser confocal one reveal that crystalline regions with spherulites are more resistant to PDs than amorphous regions. Therefore, good PD resistance can be achieved by the sample with a high crystallinity and a low permittivity.

Original languageEnglish
Pages (from-to)459-466+5
JournalIEEJ Transactions on Fundamentals and Materials
Volume127
Issue number8
DOIs
Publication statusPublished - 2007

Keywords

  • Biodegradable polymer
  • Dielectric aging
  • Electrical insulation
  • Partial discharge
  • Surface degradation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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