New attempt at the stereoselective polymerization of lactide by using crystallization during polymerization

Akihiro Ando, Kunio Kimura, Yuko Onda, Yuhiko Yamashita

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The stereoselective polymerization of partial rac-lactide was attempted by using crystallization during polymerization. Polymerizations were carried out with trifluoromethanesulfonic acid in a mixed solvent of toluene and octane. The molar content of L-lactate in the feed was 95%. Polymerization proceeded with the elimination of D-lactate by means of crystallization. Poly(L-lactic acid) (PLLA) crystals were first precipitated and then plate-like poly(lactic acid) (PLA) crystals were finally obtained, of which the composition of L-lactate was 97.6% and the M̄n was 1.68 × 104.

Original languageEnglish
Pages (from-to)98-102
Number of pages5
JournalMacromolecular Rapid Communications
Volume26
Issue number2
DOIs
Publication statusPublished - Jan 21 2005

Keywords

  • Biodegradable
  • Crystallization
  • Oligomers
  • Polyesters
  • Stereospecific polymers

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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