Chemical group in crosslinking byproducts responsible for charge trapping in polyethylene

Naoshi Hirai*, Ryotaro Minami, Toshikatsu Tanaka, Yoshimichi Ohki, Minoru Okashita, Takashi Maeno

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


It is known that space charge is formed in cables insulated with crosslinked polyethylene. It is probable that the crosslinking byproduct or the crosslinked polymer morphology is responsible for the space charge. In order to examine the former possibility, an additive-free low-density polyethylene sheet was soaked in various liquid chemicals including the crosslinking byproducts and space charge distribution inside the sheet was measured under dc voltage application. As a result, space charge appears in the vicinity of the injecting electrode only in the case that the sheet was soaked in the liquids with at least one hydroxyl group in their structures. Therefore, it is concluded that cumyl alcohol, which is the only byproduct with a hydroxyl group in its structure, is responsible for the formation of space charge in polyethylene.

Original languageEnglish
Pages (from-to)626-630
Number of pages5
JournalConference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report
Publication statusPublished - 2002
Event2002 IEEE Conference on Electrical Insulation and Dielectric Phenomena - Cancun, Mexico
Duration: 2002 Oct 202002 Oct 24

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Building and Construction


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