Abstract
The crystallinity of poly(L-lactic acid) was changed by thermal annealing and its effects on electrical conduction characteristics were studied. Low-crystallinity samples have a higher conductivity and a higher remaining charge quantity than high-crystallinity samples. The sample shows two thermally stimulated current (TSC) peaks at around Tg and about 20 °C higher than Tg when its crystallinity is low, while it shows only the former TSC peak when its crystallinity is high. The TSC peak at around T g is attributable to the micro-Brownian motion that enables the orientation of dipoles in a direction perpendicular to the polymer main chain, whereas the high-temperature peak is attributable to the orientation and magnitude change of the end-to-end vector in the polymer main chain.
| Original language | English |
|---|---|
| Pages (from-to) | 3501-3503 |
| Number of pages | 3 |
| Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
| Volume | 46 |
| Issue number | 6 A |
| DOIs | |
| Publication status | Published - 2007 Jun 6 |
Keywords
- Biodegradable polymer
- Crystallinity
- Electrical conduction
- Glass transition
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)