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Int. J. Mol. Sci. 2017, 18(6), 1312; doi:10.3390/ijms18061312

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

1
Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
2
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
3
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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Abstract

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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MDPI and ACS Style

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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