Enzymatic degradation of diol-diacid type polyesters into cyclic oligomers and its application for the selective chemical recycling of PLLA-based polymer blends

Asato Kondo, Satoko Sugihara, Kohei Okamoto, Yota Tsuneizumi, Kazunobu Toshima, Shuichi Matsumura

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

The lipase-catalyzed degradation of poly(butylene adipate) (PBA) and poly(butylene succinate) (PBS) into cyclic oligomers and their polymerizability were analyzed. The enzymatic polymerization of a cyclic oligomer was dependent on its ring-size. The highest molecular weight PBA with an Mw of 173000 was produced by the polymerization of the cyclic BA monomer The molecular weight decreased to around M w 60000 by polymerization of the cyclic BA dimer and trimer. Similar results were obtained for PBS. For the efficient chemical recycling of PBA and PBS, the cyclic BA monomer and the cyclic BS dimer had the best oligomer sizes, respectively. As an application of the enzymatic degradation for the chemical recycling of PBS, the selective recycling of the PBS/poly(L-lactic acid)(PLLA) polymer blend was carried out using a lipase and a clay catalyst, montmorillonite K5.

本文言語English
ホスト出版物のタイトルPolymer Biocatalysis and Biomaterials II
出版社American Chemical Society
ページ246-262
ページ数17
ISBN(印刷版)9780841269705
出版ステータスPublished - 2008 1月 1

出版物シリーズ

名前ACS Symposium Series
999
ISSN(印刷版)0097-6156
ISSN(電子版)1947-5918

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)

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