Effect of crystallinity on electrical conduction characteristics of poly-L-lactic acid

F. Kato, S. Omori, M. Matsushita, Yoshimichi Ohki

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

    4 Citations (Scopus)

    Abstract

    Effect of crystallinity change on electrical conduction characteristics of poly-L-lactic acid was studied experimentally. The crystallinity was changed by thermal annealing. The lower crystallinity samples have more remaining charge than the higher crystallinity samples. Moreover, at 80 °C that is above their glass transition temperatures (Tg: 55-60 °C), the conductivity is much higher in the lower crystallinity sample than in the higher crystallinity sample. The low crystallinity sample shows two thermally stimulated current (TSC) peaks - one around Tg and the other at a temperature about 20 °C higher than Tg, while the higher crystallinity sample shows only the lower-temperature TSC peak. The TSC peak around Tg is attributable to the micro-Brownian motion that enables orientation of dipoles having the direction perpendicular to the polymer main chains, while the higher-temperature TSC peak seems attributable to the orientation and magnitude change of the end-to-end vector in the polymer main chain.

    Original languageEnglish
    Title of host publicationAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
    Pages15-18
    Number of pages4
    DOIs
    Publication statusPublished - 2006
    Event2006 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Kansas City, MO
    Duration: 2006 Oct 152006 Oct 18

    Other

    Other2006 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
    CityKansas City, MO
    Period06/10/1506/10/18

    Fingerprint

    Lactic acid
    Brownian movement
    Polymers
    Temperature
    Annealing

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Kato, F., Omori, S., Matsushita, M., & Ohki, Y. (2006). Effect of crystallinity on electrical conduction characteristics of poly-L-lactic acid. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP (pp. 15-18). [4105359] https://doi.org/10.1109/CEIDP.2006.312051

    Effect of crystallinity on electrical conduction characteristics of poly-L-lactic acid. / Kato, F.; Omori, S.; Matsushita, M.; Ohki, Yoshimichi.

    Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2006. p. 15-18 4105359.

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

    Kato, F, Omori, S, Matsushita, M & Ohki, Y 2006, Effect of crystallinity on electrical conduction characteristics of poly-L-lactic acid. in Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP., 4105359, pp. 15-18, 2006 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP, Kansas City, MO, 06/10/15. https://doi.org/10.1109/CEIDP.2006.312051
    Kato F, Omori S, Matsushita M, Ohki Y. Effect of crystallinity on electrical conduction characteristics of poly-L-lactic acid. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2006. p. 15-18. 4105359 https://doi.org/10.1109/CEIDP.2006.312051
    Kato, F. ; Omori, S. ; Matsushita, M. ; Ohki, Yoshimichi. / Effect of crystallinity on electrical conduction characteristics of poly-L-lactic acid. Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2006. pp. 15-18
    @inproceedings{5664a0458b6a49e08c7a302bad26e04f,
    title = "Effect of crystallinity on electrical conduction characteristics of poly-L-lactic acid",
    abstract = "Effect of crystallinity change on electrical conduction characteristics of poly-L-lactic acid was studied experimentally. The crystallinity was changed by thermal annealing. The lower crystallinity samples have more remaining charge than the higher crystallinity samples. Moreover, at 80 °C that is above their glass transition temperatures (Tg: 55-60 °C), the conductivity is much higher in the lower crystallinity sample than in the higher crystallinity sample. The low crystallinity sample shows two thermally stimulated current (TSC) peaks - one around Tg and the other at a temperature about 20 °C higher than Tg, while the higher crystallinity sample shows only the lower-temperature TSC peak. The TSC peak around Tg is attributable to the micro-Brownian motion that enables orientation of dipoles having the direction perpendicular to the polymer main chains, while the higher-temperature TSC peak seems attributable to the orientation and magnitude change of the end-to-end vector in the polymer main chain.",
    author = "F. Kato and S. Omori and M. Matsushita and Yoshimichi Ohki",
    year = "2006",
    doi = "10.1109/CEIDP.2006.312051",
    language = "English",
    isbn = "1424405475",
    pages = "15--18",
    booktitle = "Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP",

    }

    TY - GEN

    T1 - Effect of crystallinity on electrical conduction characteristics of poly-L-lactic acid

    AU - Kato, F.

    AU - Omori, S.

    AU - Matsushita, M.

    AU - Ohki, Yoshimichi

    PY - 2006

    Y1 - 2006

    N2 - Effect of crystallinity change on electrical conduction characteristics of poly-L-lactic acid was studied experimentally. The crystallinity was changed by thermal annealing. The lower crystallinity samples have more remaining charge than the higher crystallinity samples. Moreover, at 80 °C that is above their glass transition temperatures (Tg: 55-60 °C), the conductivity is much higher in the lower crystallinity sample than in the higher crystallinity sample. The low crystallinity sample shows two thermally stimulated current (TSC) peaks - one around Tg and the other at a temperature about 20 °C higher than Tg, while the higher crystallinity sample shows only the lower-temperature TSC peak. The TSC peak around Tg is attributable to the micro-Brownian motion that enables orientation of dipoles having the direction perpendicular to the polymer main chains, while the higher-temperature TSC peak seems attributable to the orientation and magnitude change of the end-to-end vector in the polymer main chain.

    AB - Effect of crystallinity change on electrical conduction characteristics of poly-L-lactic acid was studied experimentally. The crystallinity was changed by thermal annealing. The lower crystallinity samples have more remaining charge than the higher crystallinity samples. Moreover, at 80 °C that is above their glass transition temperatures (Tg: 55-60 °C), the conductivity is much higher in the lower crystallinity sample than in the higher crystallinity sample. The low crystallinity sample shows two thermally stimulated current (TSC) peaks - one around Tg and the other at a temperature about 20 °C higher than Tg, while the higher crystallinity sample shows only the lower-temperature TSC peak. The TSC peak around Tg is attributable to the micro-Brownian motion that enables orientation of dipoles having the direction perpendicular to the polymer main chains, while the higher-temperature TSC peak seems attributable to the orientation and magnitude change of the end-to-end vector in the polymer main chain.

    UR - http://www.scopus.com/inward/record.url?scp=50549096244&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=50549096244&partnerID=8YFLogxK

    U2 - 10.1109/CEIDP.2006.312051

    DO - 10.1109/CEIDP.2006.312051

    M3 - Conference contribution

    SN - 1424405475

    SN - 9781424405473

    SP - 15

    EP - 18

    BT - Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP

    ER -