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- W3044947550 abstract "Morpholine-2,5-diones are increasingly attractive monomers derived from amino-acids whose copolymerization with other monomers produces interesting biodegradable materials. In this study, the rapid and controlled organocatalyzed ring-opening polymerization of 3S-(isobutyl)morpholine-2,5-dione (MD) and its copolymerization with lactide (LA) was accomplished using 1,8-diazabicyclo(5,4,0)undec-7-ene and a thiourea (TU) cocatalyst. The amount of TU used for the polymerization was found to be fundamental for achieving good control. A range of polymers with molecular weights between 8.1 and 25.2 kg mol–1 was thus produced with narrow chain distributions (Đ = 1.13–1.18) in short periods (5 to 10 min). Secondly, copolymers with varying compositions (MD:LA = 25:75;50:50; 75:25) were prepared (11.2 to 12.7 kg mol–1; Đ = 1.09–1.26). The kinetics of these polymerizations suggest that concurrent thioimidate and cyclic imidate mechanisms are occurring and that these are governed by the quantity of TU in respect to MD." @default.
- W3044947550 created "2020-07-29" @default.
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- W3044947550 date "2020-07-27" @default.
- W3044947550 modified "2023-09-23" @default.
- W3044947550 title "Rapid and Controlled Organocatalyzed Ring-Opening Polymerization of 3S-(Isobutyl)morpholine-2,5-dione and Copolymerization with Lactide" @default.
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- W3044947550 doi "https://doi.org/10.1021/acs.macromol.0c00940" @default.
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