Effects of ultraviolet photon irradiation on the space charge accumulation properties of several biodegradable polymers

Yuya Yamaguchi, Naoshi Hirai, Toshikatsu Tanaka, Yoshimichi Ohki, Yoshiro Tajitsu, Masanori Kohtoh, Shigemitsu Okabe

Research output: Contribution to conferencePaper

4 Citations (Scopus)

Abstract

Five kinds of biodegradable polymers were irradiated for 30 minutes by ultraviolet photons from a KrCl excimer lamp. Space charge distribution profiles observed by the pulsed electroacoustic method were compared between the non-irradiated and irradiated samples. The absorption spectra as a function of wavelength obtained for the samples indicate intensive appearance of conjugated double bonds in the vicinity of the irradiated surface in all the biodegradable polymers. Molecular weight composition profiles observed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry show that the samples were decomposed by the irradiation. This decomposition seems to be responsible for the higher conductivity of the irradiated samples, which in turn results in the change of space charge distribution profiles.

Original languageEnglish
Pages421-424
Number of pages4
Publication statusPublished - 2005 Oct 7
Event2005 International Symposium on Electrical Insulating Materials, ISEIM 2005 - Kitakyushu, Japan
Duration: 2005 Jun 52005 Jun 9

Conference

Conference2005 International Symposium on Electrical Insulating Materials, ISEIM 2005
CountryJapan
CityKitakyushu
Period05/6/505/6/9

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

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  • Cite this

    Yamaguchi, Y., Hirai, N., Tanaka, T., Ohki, Y., Tajitsu, Y., Kohtoh, M., & Okabe, S. (2005). Effects of ultraviolet photon irradiation on the space charge accumulation properties of several biodegradable polymers. 421-424. Paper presented at 2005 International Symposium on Electrical Insulating Materials, ISEIM 2005, Kitakyushu, Japan.