Effect of γ-ray irradiation on the thermally stimulated current in polyethersulfone

Yoshimichi Ohki, Eunjoo Kim, Gaku Kato, Takashi Ohara

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

    Abstract

    Effect of γ-ray irradiation on the charge behavior of polyethersulfone (PES) is investigated through the measurement of thermally stimulated current (TSC). Each sample is irradiated by γ-rays in air at room temperature to various total doses less than 30 kGy. In the TSC spectra obtained after a poling process at 37 °C, β peak at 150 °C increases first with an increase in the dose up to 0.61 kGy, and then decreases. The γ peak which is not observed in the non-irradiated sample appears at 100 °C in the irradiated sample. Similarly to the β peak, the γ peak increases in the low dose region and decreases if the irradiation dose exceeds 1 kGy. When the sample is poled at 120 °C, the γ peak is not observed and the β peak decreases monotonically as the dose Increases. It is considered that scission of polymer main chains occurs during the γ-ray irradiation and that rearrangement of main chains from a loose packing to a more rigid packing occurs while the sample is heated during the TSC measurement. This molecular rearrangement is considered to be the origin of the γ peak and also related to the decrease of the charge quantity of TSC.

    Original languageEnglish
    Title of host publicationProceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
    Editors Anon
    Place of PublicationPiscataway, NJ, United States
    PublisherIEEE
    Pages798-801
    Number of pages4
    Volume2
    Publication statusPublished - 1997
    EventProceedings of the 1997 5th IEEE International Conference on Properties and Applications of Dielectric Materials. Part 1 (of 2) - Seoul, Korea
    Duration: 1997 May 251997 May 30

    Other

    OtherProceedings of the 1997 5th IEEE International Conference on Properties and Applications of Dielectric Materials. Part 1 (of 2)
    CitySeoul, Korea
    Period97/5/2597/5/30

    Fingerprint

    Irradiation
    Dosimetry
    Electric current measurement
    Polymers
    Air
    polyether sulfone
    Temperature

    ASJC Scopus subject areas

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

    Cite this

    Ohki, Y., Kim, E., Kato, G., & Ohara, T. (1997). Effect of γ-ray irradiation on the thermally stimulated current in polyethersulfone. In Anon (Ed.), Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials (Vol. 2, pp. 798-801). Piscataway, NJ, United States: IEEE.

    Effect of γ-ray irradiation on the thermally stimulated current in polyethersulfone. / Ohki, Yoshimichi; Kim, Eunjoo; Kato, Gaku; Ohara, Takashi.

    Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials. ed. / Anon. Vol. 2 Piscataway, NJ, United States : IEEE, 1997. p. 798-801.

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

    Ohki, Y, Kim, E, Kato, G & Ohara, T 1997, Effect of γ-ray irradiation on the thermally stimulated current in polyethersulfone. in Anon (ed.), Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials. vol. 2, IEEE, Piscataway, NJ, United States, pp. 798-801, Proceedings of the 1997 5th IEEE International Conference on Properties and Applications of Dielectric Materials. Part 1 (of 2), Seoul, Korea, 97/5/25.
    Ohki Y, Kim E, Kato G, Ohara T. Effect of γ-ray irradiation on the thermally stimulated current in polyethersulfone. In Anon, editor, Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials. Vol. 2. Piscataway, NJ, United States: IEEE. 1997. p. 798-801
    Ohki, Yoshimichi ; Kim, Eunjoo ; Kato, Gaku ; Ohara, Takashi. / Effect of γ-ray irradiation on the thermally stimulated current in polyethersulfone. Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials. editor / Anon. Vol. 2 Piscataway, NJ, United States : IEEE, 1997. pp. 798-801
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