Crystallization of amorphous poly(lactic acid) induced by organic solvents

Naofumi Naga, Yuji Yoshida, Masaya Inui, Keiichi Noguchi, Shigemitsu Murase

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Crystallization of amorphous poly(lactic acid) (PLA) was investigated in various organic solvents, such as acetone, ethylacetate, diethylether, tetrahydrofurane, methanol, hexane, toluene, xylene, and o-dichlorobenene. Most of the solvents, except hexane, induced crystallization of amorphous PLA. Acetone was the most effective solvent to accelerate the crystallization among the solvents used. The crystallization was induced by permeation of acetone into the amorphous phase of PLA, and the permeation obeyed Fick type diffusion. The crystallization rate increased with increasing of conducting temperature. Crystallized PLA formed α crystalline structure. The permeated acetone in the crystallized PLA gradually evaporated as time passes, and the elimination of acetone affected thermal and mechanical properties of the crystallized PLA.

Original languageEnglish
Pages (from-to)2058-2064
Number of pages7
JournalJournal of Applied Polymer Science
Volume119
Issue number4
DOIs
Publication statusPublished - 2011 Feb 15

Keywords

  • acetone
  • crystallization
  • organic solvent
  • poly(lactic acid)

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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