Terahertz spectroscopic observation of oxidation of ethylene-propylene-diene-copolymer

Marina Komatsu, Tomoyuki Izutsu, Yoshimichi Ohki, Maya Mizuno, Kaori Fukunaga

    研究成果: Conference contribution

    5 被引用数 (Scopus)

    抄録

    Flame-retardant ethylene-propylene-diene copolymer, which is the polymer insulating material most abundantly used for safety-related electric cables in nuclear power plants, was irradiated with gamma-rays to certain designated doses from 500 to 1500 kGy at room temperature or 100 °C in air, and absorption spectra were measured at terahertz frequencies. A broad absorption is induced by the irradiation in a range from 0.5 to 3.1 THz. It is confirmed that this absorption is induced by oxidation, by comparing its frequency spectrum with spectra of polyethylene obtained numerically by doing quantum chemical calculations and experimentally by measuring its absorption at THz frequencies. Therefore, the degree of oxidation of this copolymer can be estimated by the intensity of the broad absorption at these THz frequencies.

    本文言語English
    ホスト出版物のタイトルProceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
    出版社Institute of Electrical and Electronics Engineers Inc.
    ページ544-547
    ページ数4
    2015-October
    ISBN(印刷版)9781479989034
    DOI
    出版ステータスPublished - 2015 10 8
    イベント11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015 - Sydney, Australia
    継続期間: 2015 7 192015 7 22

    Other

    Other11th IEEE International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015
    CountryAustralia
    CitySydney
    Period15/7/1915/7/22

    ASJC Scopus subject areas

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

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