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

Reiko Kondo, Kazunobu Toshima, Shuichi Matsumura

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23 Citations (Scopus)

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 m̄n = 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 m̄n of 33 000 after 6 h.

Original languageEnglish
Pages (from-to)267-271
Number of pages5
JournalMacromolecular Bioscience
Volume2
Issue number6
DOIs
Publication statusPublished - 2002 Dec 1

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Keywords

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

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biomaterials
  • Polymers and Plastics
  • Materials Chemistry

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