Lipase-catalyzed selective transformation of polycaprolactone into cyclic dicaprolactone and its repolymerization in supercritical carbon dioxide

Reiko Kondo, Kazunobu Toshima, Shuichi Matsumura

Research output: Contribution to journalArticle

Abstract

The lipase-catalyzed selective transformation of poly(ε-caprolactone) (PCL) into dicaprolactone (DCL: 1,8-dioxacyclotetradecane-2,9-dione) and the repolymerization of DCL in supercritical carbon dioxide (scCO2) were carried out for the establishment of a sustainable green polymer chemistry for PCL. PCL with a number-average molecular weight of Mn= 110 000 was selectively transformed into repolymerizable cyclic DCL in 90% yield using immobilized Candida antarctica lipase (lipase CA) in scCO2 fluid by compression to 18 MPa in the presence of a small amount of water at 40°C. The DCL obtained such was readily polymerized by lipase CA in scCO2 to produce a PCL with an Mn of 33 000 after 6 h.

Original languageEnglish
Pages (from-to)267-271
Number of pages5
JournalMacromolecular Chemistry and Physics
Volume203
Issue number12
Publication statusPublished - 2002 Aug 30

Keywords

  • Biodegradable
  • Chemical recycling
  • Enzymes
  • Polyesters
  • Supercritical carbon dioxide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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