Terahertz and far-infrared spectroscopic estimation of vinyl acetate content in ethylene-vinyl acetate copolymer

Tomoyuki Izutsu, Daisuke Odaka, Marina Komatsu, Yoshimichi Ohki, Maya Mizuno, Yoshiaki Nakamura, Naofumi Chiwata

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

    1 Citation (Scopus)

    Abstract

    For the purpose of estimating the content of vinyl acetate (VA) in ethylene-vinyl acetate copolymer (EVA), optical absorption spectra were measured in a frequency range from 0.5 to 21.0 THz for sheets of EVA containing different contents of VA from 12 to 60 % by weight and a sheet of low-density polyethylene containing no VA. As a result, it has become clear that EVA exhibits relatively sharp absorption at 2.5, 6.7, and 10.5 THz and rather broad absorption at 11 to 17 THz and 17 to 20 THz. All these absorption peaks and bands are in proportion to the content of VA, up to certain frequency-dependent contents. Using these proportionalities, the content of VA in EVA can be estimated quantitatively. Especially, the absorption at 2.5 THz shows a good accuracy similar to the method recommended by an international standard.

    Original languageEnglish
    Title of host publicationAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages39-42
    Number of pages4
    Volume2015-December
    ISBN (Print)9781467374972
    DOIs
    Publication statusPublished - 2015 Dec 9
    EventIEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2015 - Ann Arbor, United States
    Duration: 2015 Oct 182015 Oct 21

    Other

    OtherIEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2015
    CountryUnited States
    CityAnn Arbor
    Period15/10/1815/10/21

    Keywords

    • ethylene-vinyl acetate copolymer
    • far-infrared spectroscopy
    • terahertz time domain spectroscopy
    • terahertz wave
    • vinyl acetate

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

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  • Cite this

    Izutsu, T., Odaka, D., Komatsu, M., Ohki, Y., Mizuno, M., Nakamura, Y., & Chiwata, N. (2015). Terahertz and far-infrared spectroscopic estimation of vinyl acetate content in ethylene-vinyl acetate copolymer. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP (Vol. 2015-December, pp. 39-42). [7351988] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CEIDP.2015.7351988