Effects of glass transition on the dielectric breakdown and electrical conduction in several biodegradable polymers

Makoto Matsushita*, Yasumasa Maeno, Hiroki Kino, Shinjiro Fujita, Naoshi Hirai, Toshikatsu Tanaka, Yoshimichi Ohki, Yoshiro Tajitsu, Masanori Kohtoh, Shigemitsu Okabe

*この研究の対応する著者

研究成果: Paper査読

13 被引用数 (Scopus)

抄録

Results of the conductivity and breakdown strength measured for several biodegradable polymers are reported. At room temperature, poly-L-lactic acid (PLLA) and polyethylene terephthalate succinate (PETS) have relatively low conductivity values that are comparable to low density polyethylene (LDPE). However, when the fact that PLLA and PETS are in the glass state is taken into consideration, the conductivity values of PLLA and PETS should be considered to be relatively high. Moreover, PLLA and PETS show rapid increase in the conduction current around their glass transition temperatures. The other three biodegradable polymers that are in the rubber state at room temperature, namely ε-polycaprolactone butylene succinate (PCL-BS), polybutylene succinate (PBS), and polybutylene succinate adipate (PBSA), have much higher conductivities. Although the impulse breakdown strength is relatively similar in all the samples, PLLA and PETS have higher breakdown strengths in temperature regions around their glass transition temperatures. This apparently anomalous behavior is explainable by assuming that part of the energy supplied by the applied impulse voltage was consumed due to the glass transition. As for dc or ac breakdown strength at room temperature, PLLA and PETS show a relatively higher strength than PCL-BS and PBS.

本文言語English
ページ413-416
ページ数4
DOI
出版ステータスPublished - 2005
イベント2005 International Symposium on Electrical Insulating Materials, ISEIM 2005 - Kitakyushu, Japan
継続期間: 2005 6月 52005 6月 9

Conference

Conference2005 International Symposium on Electrical Insulating Materials, ISEIM 2005
国/地域Japan
CityKitakyushu
Period05/6/505/6/9

ASJC Scopus subject areas

  • 工学一般
  • 材料科学一般

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