Terahertz spectroscopic observation of cross-linked polyethylene aged simultaneously by heat and gamma-rays

Marina Komatsu, Yoshimichi Ohki, Maya Mizuno, Kaori Fukunaga

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

Chemically cross-linked polyethylene irradiated by γ-rays to certain designated doses from 100 to 800 kGy at 100°C in air was analyzed by X-ray diffraction, infrared spectroscopy and terahertz spectroscopy. It was found by infrared spectroscopy that the degree of oxidation increased when the sample was irradiated. By the terahertz spectroscopy, a peak appears at around 44 cm -1 (≃1.3 THz) when the sample was irradiated by γ-rays. By carrying out the Cole-Cole analysis on the complex permittivity spectra associated with the peak at 44 cm-1, the dipolar relaxation was found to exhibit a nearly single relaxation process. This suggests that the terahertz spectroscopy has a potential to detect the oxidative degradation of cross-linked polyethylene.

Original languageEnglish
Title of host publicationICPADM 2012 - 2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, Technical Papers
DOIs
Publication statusPublished - 2012 Nov 26
Event2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2012 - Bangalore, India
Duration: 2012 Jul 242012 Jul 28

Publication series

NameProceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials

Other

Other2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2012
CountryIndia
CityBangalore
Period12/7/2412/7/28

Keywords

  • Terahertz light
  • cable insulation
  • cross-linked polyethylene
  • radiation-induced degradation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry

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  • Cite this

    Komatsu, M., Ohki, Y., Mizuno, M., & Fukunaga, K. (2012). Terahertz spectroscopic observation of cross-linked polyethylene aged simultaneously by heat and gamma-rays. In ICPADM 2012 - 2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, Technical Papers [6318955] (Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials). https://doi.org/10.1109/ICPADM.2012.6318955