Repolymerizability of lactic acid oligomers directed towards chemical recycling of poly (lactic acid)

Yota Tsuneizumi; Futoshi Yamato; Kazunobu Toshima; Shuichi Matsumura

Repolymerizability of lactic acid oligomers directed towards chemical recycling of poly (lactic acid)

Yota Tsuneizumi, Futoshi Yamato, Kazunobu Toshima, Shuichi Matsumura

Department of Applied Chemistry

Research output: Contribution to conference › Paper › peer-review

Abstract

In order to establish the sustainable chemical recycling process of poly(L-lactic acid)(PLLA) using montmorillonite K5, repolymerizability of lactic acid oligomer (OLLA) was studied with respect to the molecular weight of the regenerated PLLA. OLLA with different M_n was prepared. Then the oligomer was repolymerized by the conventional chemical catalysts to synthesize PLLA. It was confirmed that the M_w of the regenerated PLLA decreased when the M_n of the OLLA increased to greater than 400. On the other hand, the recovery of the PLLA increased with the increasing M_n of the OLLA. These results suggested that the solubility of Sn(Oct)₂ towards OLLA affected the M_w of the regenerated PLLA.

Original language	English
Number of pages	1
Publication status	Published - 2006 Dec 1
Event	55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan Duration: 2006 Sep 20 → 2006 Sep 22

Other

Other	55th Society of Polymer Science Japan Symposium on Macromolecules
Country	Japan
City	Toyama
Period	06/9/20 → 06/9/22

Keywords

Chemical recycling
Degradation
Oligomer
poly (L-lactic acid)
Repolymerizability
Solid acid

ASJC Scopus subject areas

Engineering(all)

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Cite this

@conference{1ab671ff6cc743a6b51e9b78ecabb519,

title = "Repolymerizability of lactic acid oligomers directed towards chemical recycling of poly (lactic acid)",

abstract = "In order to establish the sustainable chemical recycling process of poly(L-lactic acid)(PLLA) using montmorillonite K5, repolymerizability of lactic acid oligomer (OLLA) was studied with respect to the molecular weight of the regenerated PLLA. OLLA with different Mn was prepared. Then the oligomer was repolymerized by the conventional chemical catalysts to synthesize PLLA. It was confirmed that the Mw of the regenerated PLLA decreased when the Mn of the OLLA increased to greater than 400. On the other hand, the recovery of the PLLA increased with the increasing Mn of the OLLA. These results suggested that the solubility of Sn(Oct)2 towards OLLA affected the Mw of the regenerated PLLA.",

keywords = "Chemical recycling, Degradation, Oligomer, poly (L-lactic acid), Repolymerizability, Solid acid",

author = "Yota Tsuneizumi and Futoshi Yamato and Kazunobu Toshima and Shuichi Matsumura",

year = "2006",

month = dec,

day = "1",

language = "English",

note = "55th Society of Polymer Science Japan Symposium on Macromolecules ; Conference date: 20-09-2006 Through 22-09-2006",

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TY - CONF

T1 - Repolymerizability of lactic acid oligomers directed towards chemical recycling of poly (lactic acid)

AU - Tsuneizumi, Yota

AU - Yamato, Futoshi

AU - Toshima, Kazunobu

AU - Matsumura, Shuichi

PY - 2006/12/1

Y1 - 2006/12/1

N2 - In order to establish the sustainable chemical recycling process of poly(L-lactic acid)(PLLA) using montmorillonite K5, repolymerizability of lactic acid oligomer (OLLA) was studied with respect to the molecular weight of the regenerated PLLA. OLLA with different Mn was prepared. Then the oligomer was repolymerized by the conventional chemical catalysts to synthesize PLLA. It was confirmed that the Mw of the regenerated PLLA decreased when the Mn of the OLLA increased to greater than 400. On the other hand, the recovery of the PLLA increased with the increasing Mn of the OLLA. These results suggested that the solubility of Sn(Oct)2 towards OLLA affected the Mw of the regenerated PLLA.

AB - In order to establish the sustainable chemical recycling process of poly(L-lactic acid)(PLLA) using montmorillonite K5, repolymerizability of lactic acid oligomer (OLLA) was studied with respect to the molecular weight of the regenerated PLLA. OLLA with different Mn was prepared. Then the oligomer was repolymerized by the conventional chemical catalysts to synthesize PLLA. It was confirmed that the Mw of the regenerated PLLA decreased when the Mn of the OLLA increased to greater than 400. On the other hand, the recovery of the PLLA increased with the increasing Mn of the OLLA. These results suggested that the solubility of Sn(Oct)2 towards OLLA affected the Mw of the regenerated PLLA.

KW - Chemical recycling

KW - Degradation

KW - Oligomer

KW - poly (L-lactic acid)

KW - Repolymerizability

KW - Solid acid

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AN - SCOPUS:33846133272

T2 - 55th Society of Polymer Science Japan Symposium on Macromolecules

Y2 - 20 September 2006 through 22 September 2006

ER -