Effects of crystallinity and electron mean-free-path on dielectric strength of low density polyethylene

Y. Tanaka, N. Ohnuma, K. Katsunami, Y. Ohki

Research output: Contribution to journalConference article

2 Citations (Scopus)


The mean free path of photoinjected hot electrons in LDPE was obtained experimentally, and based on this result the relation between crystallinity and dielectric strength is discussed. The change in X-ray diffraction spectra of 50-μm-thick hot-pressed LDPE films of annealed at various temperatures is shown. The crystallinity of the film is improved as the annealing temperature increases. The relation between the dielectric strength and the annealing temperature of the hot-pressed film is shown. The dielectric strength decreases as the annealing temperature increases, as shown in measurements at room temperature and -50°C. The heat treatment improves the crystallinity and makes the mean free path longer, resulting in a lower dielectric strength.

Original languageEnglish
Pages (from-to)545-550
Number of pages6
JournalConference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report
Publication statusPublished - 1990 Oct 1
Event1990 Conference on Electrical Insulation and Dielectric Phenomena - Pocono Manor, PA, USA
Duration: 1990 Oct 281990 Oct 31


ASJC Scopus subject areas

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

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