In situ formation of Sm(III) initiator from SmI2/MMA for ring opening polymerization of cyclic esters

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Agarwal, Seema:
In situ formation of Sm(III) initiator from SmI2/MMA for ring opening polymerization of cyclic esters.
In: European Polymer Journal. Bd. 40 (2004) Heft 9 . - S. 2143-2152.
ISSN 1873-1945
DOI: https://doi.org/10.1016/j.eurpolymj.2004.05.006

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Abstract

Sm(III) complex was generated in situ by one-electron transfer reaction of SmI2 with MMA. The resulting Sm(III) complex was tried as ring opening polymerization (ROP) initiator for cyclic esters like F-caprolactone (CL). The polymers were obtained in high yield with low polydispersity index (1.1-1.2). The system was also used for the synthesis of block copolymers. Structural characterization of the resulting polymers was done using ID (H-1, C-13, F-19) and 2D (H-1-C-13 heteronuclear multiple quantum correlation (HMQC) and heteronuclear rnultiple-bond correlation (HMBC)) NMR spectroscopic techniques. (C) 2004 Elsevier Ltd. All rights reserved.