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

    6 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 publicationProceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
    DOIs
    Publication statusPublished - 2012
    Event2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2012 - Bangalore, India
    Duration: 2012 Jul 242012 Jul 28

    Other

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

      Fingerprint

    Keywords

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

    ASJC Scopus subject areas

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

    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 Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials [6318955] https://doi.org/10.1109/ICPADM.2012.6318955