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

    5 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

    Terahertz spectroscopy
    Polyethylene
    Gamma rays
    Polyethylenes
    polyethylenes
    gamma rays
    heat
    Infrared spectroscopy
    rays
    infrared spectroscopy
    spectroscopy
    Relaxation processes
    Permittivity
    permittivity
    degradation
    X ray diffraction
    Degradation
    dosage
    Oxidation
    oxidation

    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

    Terahertz spectroscopic observation of cross-linked polyethylene aged simultaneously by heat and gamma-rays. / Komatsu, Marina; Ohki, Yoshimichi; Mizuno, Maya; Fukunaga, Kaori.

    Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials. 2012. 6318955.

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

    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, 2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2012, Bangalore, India, 12/7/24. https://doi.org/10.1109/ICPADM.2012.6318955
    Komatsu M, Ohki Y, Mizuno M, Fukunaga K. 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. 2012. 6318955 https://doi.org/10.1109/ICPADM.2012.6318955
    Komatsu, Marina ; Ohki, Yoshimichi ; Mizuno, Maya ; Fukunaga, Kaori. / Terahertz spectroscopic observation of cross-linked polyethylene aged simultaneously by heat and gamma-rays. Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials. 2012.
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