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R. Liénard, T. Josse, J. De Winter, P. Dubois, P. Gerbaux, O. Coulembier

Preparation of highly pure cyclo-polylactides by optimization
of the copper-catalyzed azide-alkyne cycloaddition reaction (in English)

Polimery 2017, No 4, 283


DOI: dx.doi.org/10.14314/polimery.2017.283

Summary

This work reports on the preparation of highly pure cyclo-polylactides (Mn ≈ 4 000 g · mol-1) by the optimization of the copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction applied on α-azide-ω-alkyne linear polylactide (PLA) precursors. By adjusting parameters such as the rate of reactant addition and the catalyst loading, monocyclic PLA's with a degree of purity of 93 % are obtained in few minutes. Highly pure monocycles (purity as high as 99.9 %) are also possibly prepared in few hours.
Keywords: lactide, ring-opening polymerization, copper-catalyzed azide-alkyne cycloaddition, cyclization
e-mail: olivier.coulembier@umons.ac.be
R. Liénard, T. Josse, J. De Winter, P. Dubois, P. Gerbaux, O. Coulembier (1.78 MB)
Preparation of highly pure cyclo-polylactides by optimization of the copper-catalyzed azide-alkyne cycloaddition reaction (in English)