Electrical conduction and dielectric relaxation in polyethylene terephthalate succinate

Fukutaro Kato, Yoshimichi Ohki

    研究成果: Article

    7 引用 (Scopus)

    抄録

    Electrical conduction and complex permittivity are examined in polyethylene terephthalate succinate, focusing on their relations to dielectric relaxation processes. Both the real and imaginary parts of complex permittivity, namely dielectric constant σrand dielectric loss factor σr", increase with a decrease in frequency, especially at high temperatures. They are both ascribed to the transport of ionic mobile carriers. Namely, the carrier transport forms conduction current that should contribute to σr". On this occasion, if charge exchange does not occur at the two electrodes, heterocharge layers should be formed before the electrodes. This should increase the charge density on the electrodes, thus contributing to σr' In addition to the increase in σr' and σr' due to mobile ions, two relaxation processes, one due to micro-Brownian motion of dipoles and the other due to orientation and magnitude change of the dipole moment induced by two end groups in the polymer main chain, are observed. Corresponding to these two relaxation processes, two thermally stimulated discharge current (TSDC) peaks appear. The two TSDC peaks as well as the increment in σr' and σr" become larger when the crystallinity of the sample decreases.

    元の言語English
    ジャーナルIEEJ Transactions on Fundamentals and Materials
    128
    発行部数7
    DOI
    出版物ステータスPublished - 2008

    Fingerprint

    Dielectric relaxation
    Relaxation processes
    Polyethylene terephthalates
    Permittivity
    Electrodes
    Carrier transport
    Brownian movement
    Dipole moment
    Dielectric losses
    Charge density
    Ions
    Polymers
    Temperature

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    これを引用

    @article{4c44458978ef47219f72be53e0ca7691,
    title = "Electrical conduction and dielectric relaxation in polyethylene terephthalate succinate",
    abstract = "Electrical conduction and complex permittivity are examined in polyethylene terephthalate succinate, focusing on their relations to dielectric relaxation processes. Both the real and imaginary parts of complex permittivity, namely dielectric constant σrand dielectric loss factor σr{"}, increase with a decrease in frequency, especially at high temperatures. They are both ascribed to the transport of ionic mobile carriers. Namely, the carrier transport forms conduction current that should contribute to σr{"}. On this occasion, if charge exchange does not occur at the two electrodes, heterocharge layers should be formed before the electrodes. This should increase the charge density on the electrodes, thus contributing to σr' In addition to the increase in σr' and σr' due to mobile ions, two relaxation processes, one due to micro-Brownian motion of dipoles and the other due to orientation and magnitude change of the dipole moment induced by two end groups in the polymer main chain, are observed. Corresponding to these two relaxation processes, two thermally stimulated discharge current (TSDC) peaks appear. The two TSDC peaks as well as the increment in σr' and σr{"} become larger when the crystallinity of the sample decreases.",
    keywords = "Complex permittivity, Polyethylene terephthalate succinate, Thermally stimulated discharge current",
    author = "Fukutaro Kato and Yoshimichi Ohki",
    year = "2008",
    doi = "10.1541/ieejfms.128.490",
    language = "English",
    volume = "128",
    journal = "IEEJ Transactions on Fundamentals and Materials",
    issn = "0385-4205",
    publisher = "The Institute of Electrical Engineers of Japan",
    number = "7",

    }

    TY - JOUR

    T1 - Electrical conduction and dielectric relaxation in polyethylene terephthalate succinate

    AU - Kato, Fukutaro

    AU - Ohki, Yoshimichi

    PY - 2008

    Y1 - 2008

    N2 - Electrical conduction and complex permittivity are examined in polyethylene terephthalate succinate, focusing on their relations to dielectric relaxation processes. Both the real and imaginary parts of complex permittivity, namely dielectric constant σrand dielectric loss factor σr", increase with a decrease in frequency, especially at high temperatures. They are both ascribed to the transport of ionic mobile carriers. Namely, the carrier transport forms conduction current that should contribute to σr". On this occasion, if charge exchange does not occur at the two electrodes, heterocharge layers should be formed before the electrodes. This should increase the charge density on the electrodes, thus contributing to σr' In addition to the increase in σr' and σr' due to mobile ions, two relaxation processes, one due to micro-Brownian motion of dipoles and the other due to orientation and magnitude change of the dipole moment induced by two end groups in the polymer main chain, are observed. Corresponding to these two relaxation processes, two thermally stimulated discharge current (TSDC) peaks appear. The two TSDC peaks as well as the increment in σr' and σr" become larger when the crystallinity of the sample decreases.

    AB - Electrical conduction and complex permittivity are examined in polyethylene terephthalate succinate, focusing on their relations to dielectric relaxation processes. Both the real and imaginary parts of complex permittivity, namely dielectric constant σrand dielectric loss factor σr", increase with a decrease in frequency, especially at high temperatures. They are both ascribed to the transport of ionic mobile carriers. Namely, the carrier transport forms conduction current that should contribute to σr". On this occasion, if charge exchange does not occur at the two electrodes, heterocharge layers should be formed before the electrodes. This should increase the charge density on the electrodes, thus contributing to σr' In addition to the increase in σr' and σr' due to mobile ions, two relaxation processes, one due to micro-Brownian motion of dipoles and the other due to orientation and magnitude change of the dipole moment induced by two end groups in the polymer main chain, are observed. Corresponding to these two relaxation processes, two thermally stimulated discharge current (TSDC) peaks appear. The two TSDC peaks as well as the increment in σr' and σr" become larger when the crystallinity of the sample decreases.

    KW - Complex permittivity

    KW - Polyethylene terephthalate succinate

    KW - Thermally stimulated discharge current

    UR - http://www.scopus.com/inward/record.url?scp=71049146637&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=71049146637&partnerID=8YFLogxK

    U2 - 10.1541/ieejfms.128.490

    DO - 10.1541/ieejfms.128.490

    M3 - Article

    AN - SCOPUS:71049146637

    VL - 128

    JO - IEEJ Transactions on Fundamentals and Materials

    JF - IEEJ Transactions on Fundamentals and Materials

    SN - 0385-4205

    IS - 7

    ER -