Sustainable chemical recycling of poly(L-lactic acid) using montmorillonite

Kohei Okamoto, Kazunobu Toshima, Shuichi Matsumura

Research output: Contribution to conferencePaper

Abstract

In order to establish the sustainable chemical recycling process of poly(L-lactic acid), a high molecular weight poly(L-lactic acid) was transformed into the corresponding lactate oligomers having a molecular weight of few hundreds by using environmentally benign solid acids, such as montmorillonite K10. The oligomer was repolymerized by the conventional chemical catalysts forming a high molecular weight poly(L-lactic acid). It was also confirmed that the repolymerized product showed the same Tm as that obtained by the polymerization of the authentic L-lactic acid. This chemical recycling process was applicable to poly[(L-lactic acid)/( ε -caprolactone)] copolymer.

Original languageEnglish
Pages5334-5335
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

  • Chemical recycling
  • Montmorillonite
  • Oligomer
  • Poly(caprolactone)
  • Poly(L-lactic acid)
  • Solid acid

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Okamoto, K., Toshima, K., & Matsumura, S. (2005). Sustainable chemical recycling of poly(L-lactic acid) using montmorillonite. 5334-5335. Paper presented at 54th SPSJ Symposium on Macromolecules, Yamagata, Japan.