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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Maeno, Y. Yamaguchi, Y. Hirai, N. Tanaka, T. Ohki, Y. Tajitsu, Y. Kohtoh, M. Okabe, S. |
| Copyright Year | 2004 |
| Description | Author affiliation: Dept. of EEBS, Waseda Univ., Tokyo, Japan (Maeno, Y.; Yamaguchi, Y.; Hirai, N.) |
| 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/spl deg/C. From these results, it is confirmed that orientational polarization or depolarization occurs around 74/spl deg/C by the glass transition, and that its resultant current and the conduction current overlap with each other. |
| Starting Page | 49 |
| Ending Page | 52 |
| File Size | 283649 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780385845 |
| DOI | 10.1109/CEIDP.2004.1364186 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-10-20 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Glass Biodegradable materials Polymers Dielectric measurements Dielectric constant Dielectric losses Frequency Temperature dependence Current measurement Biological materials |
| Content Type | Text |
| Resource Type | Article |
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