Synthesis and degradation of end-group-functionalized polylactide

Soo Hong Lee, Soo Hyun Kim, Yang Kyoo Han, Young Ha Kim

Research output: Contribution to journalArticle

121 Citations (Scopus)

Abstract

Three kinds of OH-terminated polylactides were synthesized by the ring-opening polymerization of lactide, with an alcohol such as dodecanol, glycerol, or pentaerythritol, in the presence of stannous octoate. Moreover, Cl-, NH2-, and COOH-terminated polylactides were synthesized from OH-terminated polylactides. The end groups of the polylactides were identified by 1H NMR and 18C NMR. According to thermal analysis, the cold crystallization temperatures of Cl-, NH2-, and COOH-terminated polylactides were higher than those of OH-terminated polylactides. The thermal stability of OH-terminated polylactides was poor, whereas NH2- and Cl-terminated polylactides were more resistant to thermal degradation. In a hydrolysis degradation test, the mass and molecular weight loss of COOH-terminated polylactides were high, whereas those of Cl- and NH2-terminated polylactides were much lower. These end-group effects were increased with an increasing number of chain arms.

Original languageEnglish
Pages (from-to)973-985
Number of pages13
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume39
Issue number7
DOIs
Publication statusPublished - 2001 Apr 1

Keywords

  • Degradation
  • End group
  • Functionalized polylactide
  • Lactide
  • Polylactide

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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