Effect of glass transition on conduction current in biodegradable poly-L-lactic acid

Y. Maeno*, Y. Yamaguchi, N. Hirai, T. Tanaka, Y. Ohki, Y. Tajitsu, M. Kohtoh, S. Okabe

*この研究の対応する著者

研究成果: Conference article査読

8 被引用数 (Scopus)

抄録

The temperature dependence of electrical conduction current in additive-free poly-L-lactic acid was measured. Although the current obeys the Arrhenius formula, a hump appears under some conditions, depending on whether the temperature is being ascended or descended, and also on whether the sample was poled or short-circuited prior to the measurements. That polar groups consisting mainly of carbonyl groups in the sample changed their directions was confirmed by Fourier-transform infrared spectroscopy. The permittivity increases around 74°C. From these results, it is confirmed that orientational polarization or depolarization occurs around 74°C by the glass transition, and that its resultant current and the conduction current overlap with each other.

本文言語English
ページ(範囲)49-52
ページ数4
ジャーナルAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
出版ステータスPublished - 2004 12 1
イベント2004 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Boulder, CO, United States
継続期間: 2004 10 172004 10 20

ASJC Scopus subject areas

  • 工学(全般)

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