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

Y. Maeno, Y. Yamaguchi, Naoshi Hirai, T. Tanaka, Yoshimichi Ohki, Y. Tajitsu, M. Kohtoh, S. Okabe

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

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Pages49-52
Number of pages4
Publication statusPublished - 2004
Event2004 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Boulder, CO, United States
Duration: 2004 Oct 172004 Oct 20

Other

Other2004 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
CountryUnited States
CityBoulder, CO
Period04/10/1704/10/20

Fingerprint

Lactic acid
Glass transition
Depolarization
Fourier transform infrared spectroscopy
Permittivity
Polarization
Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Maeno, Y., Yamaguchi, Y., Hirai, N., Tanaka, T., Ohki, Y., Tajitsu, Y., ... Okabe, S. (2004). Effect of glass transition on conduction current in biodegradable poly-L-lactic acid. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP (pp. 49-52)

Effect of glass transition on conduction current in biodegradable poly-L-lactic acid. / Maeno, Y.; Yamaguchi, Y.; Hirai, Naoshi; Tanaka, T.; Ohki, Yoshimichi; Tajitsu, Y.; Kohtoh, M.; Okabe, S.

Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2004. p. 49-52.

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

Maeno, Y, Yamaguchi, Y, Hirai, N, Tanaka, T, Ohki, Y, Tajitsu, Y, Kohtoh, M & Okabe, S 2004, Effect of glass transition on conduction current in biodegradable poly-L-lactic acid. in Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. pp. 49-52, 2004 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP, Boulder, CO, United States, 04/10/17.
Maeno Y, Yamaguchi Y, Hirai N, Tanaka T, Ohki Y, Tajitsu Y et al. Effect of glass transition on conduction current in biodegradable poly-L-lactic acid. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2004. p. 49-52
Maeno, Y. ; Yamaguchi, Y. ; Hirai, Naoshi ; Tanaka, T. ; Ohki, Yoshimichi ; Tajitsu, Y. ; Kohtoh, M. ; Okabe, S. / Effect of glass transition on conduction current in biodegradable poly-L-lactic acid. Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2004. pp. 49-52
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