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Int. J. Mol. Sci. 2017, 18(6), 1312;

Synthesis and Biodegradation of Poly(l-lactide-co-β-propiolactone)

Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
Department of Applied Chemistry and Biotechnology, Niihama National College of Technology, Niihama 792-8580, Japan
Authors to whom correspondence should be addressed.
Received: 28 April 2017 / Revised: 26 May 2017 / Accepted: 13 June 2017 / Published: 20 June 2017
(This article belongs to the Special Issue Biodegradable Materials 2017)
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Although the copolymerizations of l-lactide (LA) with seven- or six-membered ring lactones have been extensively studied, the copolymerizations of LA with four-membered ring lactones have scarcely been reported. In this work, we studied the copolymerization of LA with β-propiolactone (PL) and the properties of the obtained copolymers. The copolymerization of LA with PL was carried out using trifluoromethanesulfonic acid as a catalyst and methanol as an initiator to produce poly(LA-co-PL) with Mn of ~50,000 and PL-content of 6–67 mol %. The Tg values of the copolymers were rapidly lowered with increasing PL-contents. The Tm and ΔHm of the copolymers gradually decreased with increasing PL-contents, indicating their decreased crystallinity. Biodegradation test of the copolymers in compost demonstrated their improved biodegradability in comparison with the homopolymer of LA. View Full-Text
Keywords: copolymerization; l-lactide; β-propiolactone; trifluoromethanesulfonic acid; poly(l-lactide-co-β-propiolactone); thermal properties; biodegradation copolymerization; l-lactide; β-propiolactone; trifluoromethanesulfonic acid; poly(l-lactide-co-β-propiolactone); thermal properties; biodegradation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Nakayama, Y.; Aihara, K.; Cai, Z.; Shiono, T.; Tsutsumi, C. Synthesis and Biodegradation of Poly(l-lactide-co-β-propiolactone). Int. J. Mol. Sci. 2017, 18, 1312.

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