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

Research output: Contribution to conferencePaper

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages413-416
Number of pages4
DOIs
Publication statusPublished - 2005
Event2005 International Symposium on Electrical Insulating Materials, ISEIM 2005 - Kitakyushu, Japan
Duration: 2005 Jun 52005 Jun 9

Conference

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

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

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    Matsushita, M., Maeno, Y., Kino, H., Fujita, S., Hirai, N., Tanaka, T., Ohki, Y., Tajitsu, Y., Kohtoh, M., & Okabe, S. (2005). Effects of glass transition on the dielectric breakdown and electrical conduction in several biodegradable polymers. 413-416. Paper presented at 2005 International Symposium on Electrical Insulating Materials, ISEIM 2005, Kitakyushu, Japan. https://doi.org/10.1109/iseim.2005.193576