Origins of photoluminescence bands induced by ultraviolet photons in polyethylene

Toshihide Ito, D. Kaneko, Y. Ohki

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

Photoluminescence (PL) spectra in low-density polyethylene (LDPE) and crosslinked polyethylene (XLPE) induced by irradiation of ultraviolet photons are examined. The samples were pre-irradiated by the ultraviolet photons under different atmospheres (air, O2, and vacuum) in order to induce photochemical reactions. Two PL bands appear around 3.6 and 4.2 eV in LDPE. Their intensities decrease with the progress of the pre-irradiation regardless of the irradiation atmosphere. The two PLs are considered to be due to conjugated double bonds present in the antioxidant and impurities. A new PL band appears at 2.9 eV in LDPE if the sample was pre-irradiated in vacuum. This PL is considered to be due to photoinduced conjugated double bonds. In XLPE, a PL band different from the ones observed in LDPE appears at 3.1 eV. It is considered that the crosslinking byproducts are responsible for this band.

Original languageEnglish
Pages (from-to)856-860
Number of pages5
JournalConference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report
Publication statusPublished - 2002 Jan 1
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

Fingerprint Dive into the research topics of 'Origins of photoluminescence bands induced by ultraviolet photons in polyethylene'. Together they form a unique fingerprint.

  • Cite this