Chemical recycling of aliphatic polyester by lipase

Asato Kondo, Kazunobu Toshima, Shuichi Matsumura

Research output: Contribution to conferencePaper

Abstract

Cyclic oligomers obtained by the enzymatic degradation of aliphatic polyesters are attractive as raw materials for chemical recycling. In this report, molecularly pure cyclic oligomers of butylene adipate, which were obtained by the lipase-catalyzed degradation of poly (butylene adipate), were studied with respect to the polymerization by the enzyme. That is, poly (butylene adipate) was degraded in dry toluene using Candida antarctica lipase to produce cyclic oligomers mainly consisting of cyclic monomer to cyclic tetramer. It was found that cyclic dimer to tetramer were quickly polymerized by lipase to produce high-molecular weight polymers within 30 min. On the other hand, cyclic monomer was slowly polymerized, and it took longer than 120 min for complete conversion. Similar tendencies were observed for PCL and PBS degradation and polymerization.

Original languageEnglish
Pages5336-5337
Number of pages2
Publication statusPublished - 2005 Dec 1
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: 2005 Sep 202005 Sep 22

Other

Other54th SPSJ Symposium on Macromolecules
CountryJapan
CityYamagata
Period05/9/2005/9/22

Keywords

  • Activation energy
  • Cyclic oligomer
  • Lipase
  • Poly (butylene adipate)
  • Ring-opening polymerization

ASJC Scopus subject areas

  • Engineering(all)

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