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

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 pr...

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Detalles Bibliográficos
Autores principales: Nakayama, Yuushou, Aihara, Kazuki, Cai, Zhengguo, Shiono, Takeshi, Tsutsumi, Chikara
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5486133/
https://www.ncbi.nlm.nih.gov/pubmed/28632154
http://dx.doi.org/10.3390/ijms18061312
Descripción
Sumario: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 M(n) of ~50,000 and PL-content of 6–67 mol %. The T(g) values of the copolymers were rapidly lowered with increasing PL-contents. The T(m) and ΔH(m) 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.