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

F. Kato*, S. Omori, M. Matsushita, Y. Ohki

*Corresponding author for this work

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

5 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 publication2006 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Pages15-18
Number of pages4
DOIs
Publication statusPublished - 2006 Dec 1
Event2006 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Kansas City, MO, United States
Duration: 2006 Oct 152006 Oct 18

Publication series

NameAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
ISSN (Print)0084-9162

Conference

Conference2006 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Country/TerritoryUnited States
CityKansas City, MO
Period06/10/1506/10/18

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint

Dive into the research topics of 'Effect of crystallinity on electrical conduction characteristics of poly-L-lactic acid'. Together they form a unique fingerprint.

Cite this