organocatalytic stereoselective cyclic polylactide synthesis in supercritical carbon dioxide under plasticizing conditions
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ID: 224232
2018
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Abstract
Cyclic polylactide (cPLA) is a structural isomer of linear polylactide (PLA) although it possesses unique functionalities in comparison to its linear counterpart. Hitherto, the control of stereochemical purity in conventional cPLA synthesis has not been achieved. In this study, highly stereochemically pure cPLA was synthesized in the absence of a metal catalyst and organic solvent, which required high consumption of the residual monomer. The synthesis was conducted in supercritical carbon dioxide under CO2 plasticizing polymerization conditions in the presence of an organocatalyst and thiourea additives. In comparison with the stereocomplexes synthesized through conventional methods, cPLA from l-lactide (cPLLA) and cPLA from d-lactide (cPDLA) were synthesized with higher stereochemical purity and improved thermal stability. Moreover, the method presented herein is environmentally friendly and thus, applicable on an industrial level.
| Reference Key |
mase2018polymersorganocatalytic
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|---|---|
| Authors | ;Nobuyuki Mase;Moniruzzaman;Shoji Yamamoto;Yoshitaka Nakaya;Kohei Sato;Tetsuo Narumi |
| Journal | Journal of Fluorescence |
| Year | 2018 |
| DOI |
10.3390/polym10070713
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| URL | |
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