Comparison between poly(ethylene naphthalate) and poly(ethylene terephthalate) in terms of gamma-ray irradiation on their dielectric properties

Maki Miyamoto, Yoshimichi Ohki

    Research output: Contribution to journalArticle

    Abstract

    The effects of gamma-rays on the complex permittivity (ϵr' and ϵr'') and electrical conductivity were compared between poly(ethylene naphthalate) (PEN) and poly(ethylene terephthalate) (PET). Although both ϵ'r and ϵ''r increase in PET with an increase in the total dose of gamma irradiation, such increases are hardly observed in PEN. The conductivity is always smaller in PEN than in PET. Therefore, it has been confirmed that charge transport is less activated by gamma irradiation in PEN than in PET. Together with experimental results obtained by ultraviolet-visible absorption spectroscopy and thermogravimetric analysis, it can be concluded that PEN has a superior anti-gamma-ray dielectric property to PET.

    Original languageEnglish
    Article number061601
    JournalJapanese Journal of Applied Physics
    Volume56
    Issue number6
    DOIs
    Publication statusPublished - 2017 Jun 1

    Fingerprint

    polyethylene terephthalate
    Gamma rays
    Dielectric properties
    Polyethylene terephthalates
    dielectric properties
    Ethylene
    ethylene
    Irradiation
    gamma rays
    irradiation
    Absorption spectroscopy
    Dosimetry
    Thermogravimetric analysis
    Charge transfer
    absorption spectroscopy
    Permittivity
    permittivity
    dosage
    conductivity
    electrical resistivity

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

    Cite this

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    abstract = "The effects of gamma-rays on the complex permittivity (ϵr' and ϵr'') and electrical conductivity were compared between poly(ethylene naphthalate) (PEN) and poly(ethylene terephthalate) (PET). Although both ϵ'r and ϵ''r increase in PET with an increase in the total dose of gamma irradiation, such increases are hardly observed in PEN. The conductivity is always smaller in PEN than in PET. Therefore, it has been confirmed that charge transport is less activated by gamma irradiation in PEN than in PET. Together with experimental results obtained by ultraviolet-visible absorption spectroscopy and thermogravimetric analysis, it can be concluded that PEN has a superior anti-gamma-ray dielectric property to PET.",
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    AB - The effects of gamma-rays on the complex permittivity (ϵr' and ϵr'') and electrical conductivity were compared between poly(ethylene naphthalate) (PEN) and poly(ethylene terephthalate) (PET). Although both ϵ'r and ϵ''r increase in PET with an increase in the total dose of gamma irradiation, such increases are hardly observed in PEN. The conductivity is always smaller in PEN than in PET. Therefore, it has been confirmed that charge transport is less activated by gamma irradiation in PEN than in PET. Together with experimental results obtained by ultraviolet-visible absorption spectroscopy and thermogravimetric analysis, it can be concluded that PEN has a superior anti-gamma-ray dielectric property to PET.

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