Comparison between far-IR and IR absorption spectroscopy for estimating vinyl acetate content in ethylene-vinyl acetate copolymer

Daisuke Odaka, Tomoyuki Izutsu, Marina Komatsu, Yoshimichi Ohki, Maya Mizuno

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    2 Citations (Scopus)


    Far-IR absorption spectra at frequencies from 0.5 to 21.0 THz were obtained for sheets of ethylene-vinyl acetate copolymer (EVA) containing different contents of vinyl acetate (VA) from 12 to 60% with different thicknesses from 1.0 to 3.0 mm. As a result, EVA exhibits absorption at 2.5, 6.7, 10.5, 11-17, and 17-20 THz. Especially, the 2.5-THz intensity with a good proportionality up to 60% of VA content exhibits comparable accuracy to the IR method and is applicable for estimating the VA content in EVA sheets 2.0 or 3.0 mm thick, for which IR method is difficult to be applied.

    Original languageEnglish
    Pages (from-to)171-177
    Number of pages7
    JournalIEEJ Transactions on Fundamentals and Materials
    Issue number3
    Publication statusPublished - 2017



    • Ethylene-vinyl acetate copolymer
    • Far-IR spectroscopy
    • IR spectroscopy
    • Terahertz time domain spectroscopy
    • Terahertz wave
    • Vinyl acetate content

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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