Radiation-induced phenomena in ethylene-co-tetrafluoroethylene polymer: Temperature and LET effects

Akihiro Oshima, Masakazu Washio

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

Irradiation temperature and linear energy transfer (LET) dependency on radiation-induced reactions of ethylene-co-tetrafluoroethylene polymer (ETFE) were investigated precisely by using low and high LET beams, and in a wide range of irradiation temperatures from 77 to 573 K including its melting temperature, respectively. At various temperatures irradiation by low LET beam such as γ-rays or electron beams, significant changes were observed in the photo-absorption spectra in the wavelength region between 200 and 500 nm. The general tendency is that the absorption band shifts to longer wavelengths with higher irradiation temperatures. The enhancement of the photo-absorption at 200-500 nm is due to the formation of conjugated double bonds in ETFE by irradiation. By high LET beam irradiation at room temperature such as ion beams, the photo-absorption spectra was different from those of low LET beams, i.e. the new absorption bands around 250-450 nm was appeared. It could be suggested that the high LET beams induced the production of intermediate species in a localized area such as track structure. As a result, reaction kinetics are different from low LET beams.

Original languageEnglish
Pages (from-to)380-384
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume208
Issue number1-4
DOIs
Publication statusPublished - 2003 Aug 1
EventIonizing Radiation and Polymers - Sainte-Adele, QUE, Canada
Duration: 2002 Sep 212002 Sep 26

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Keywords

  • Double bonds
  • ETFE
  • Ion beams
  • LET
  • Optical density
  • Temperature

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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