Chemical recycling of aliphatic polyester by lipase

Asato Kondo, Kazunobu Toshima, Shuichi Matsumura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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
Title of host publicationPolymer Preprints, Japan
Pages5336-5337
Number of pages2
Volume54
Edition2
Publication statusPublished - 2005
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

Fingerprint

Lipases
Oligomers
Recycling
Polyesters
Degradation
Monomers
Polymerization
Candida
Dimers
Toluene
Raw materials
Enzymes
Molecular weight
Polymers

Keywords

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

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kondo, A., Toshima, K., & Matsumura, S. (2005). Chemical recycling of aliphatic polyester by lipase. In Polymer Preprints, Japan (2 ed., Vol. 54, pp. 5336-5337)

Chemical recycling of aliphatic polyester by lipase. / Kondo, Asato; Toshima, Kazunobu; Matsumura, Shuichi.

Polymer Preprints, Japan. Vol. 54 2. ed. 2005. p. 5336-5337.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kondo, A, Toshima, K & Matsumura, S 2005, Chemical recycling of aliphatic polyester by lipase. in Polymer Preprints, Japan. 2 edn, vol. 54, pp. 5336-5337, 54th SPSJ Symposium on Macromolecules, Yamagata, Japan, 05/9/20.
Kondo A, Toshima K, Matsumura S. Chemical recycling of aliphatic polyester by lipase. In Polymer Preprints, Japan. 2 ed. Vol. 54. 2005. p. 5336-5337
Kondo, Asato ; Toshima, Kazunobu ; Matsumura, Shuichi. / Chemical recycling of aliphatic polyester by lipase. Polymer Preprints, Japan. Vol. 54 2. ed. 2005. pp. 5336-5337
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AB - 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.

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