Optical activity of poly-l-lactic acid

Toru Asahi, Haruko Fukase, Masaaki Ichiki, Jinzo Kobayashi, Eiichi Fukada*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Simultaneous measurements of optical activity and birefringence have been made for the first time on poly-L-lactic acid (PLLA), which is a well-known piezoelectric and biodegradable polymer. Optical gyration of PLLA films, one stretched 2.5 times the other 6 times as long as the original ones, displayed different temperature dependence in the higher and lower temperature regions and changed the sign in the lower one. These facts suggest a conformational change to take place in PLLA at some temperature in the lower one.

Original languageEnglish
Pages (from-to)339-342
Number of pages4
Issue number1
Publication statusPublished - 1990 Sept 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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