Controlled stereoselective polymerization of lactide monomers by group 4 metal initiators that contain an (OSSO)-type tetradentate bis(phenolate) ligand
Literature Information
Publication Date
2011-08-15
DOI
10.1039/C1PY00266J
Impact Factor
5.582
Authors
Jean-Charles Buffet, Ashley N. Martin, Moshe Kol, Jun Okuda
View Original
Abstract
Group 4 metal complexes Zr-1 to Zr-4, Ti-4 and Ti-4a that contain an (OSSO)-type tetradentate bis(phenolate) ligand were found to initiate the ring-opening polymerization of meso-, rac-, and L-lactides in toluene solution. The polymerizations were controlled with initiator efficiency values around one and gave polymers with low polydispersity (Mw/Mn < 1.2). The polylactides were atactic when rac-lactide was used as the monomer and heterotactic biased when meso-lactide was used. Kinetic measurements showed that meso-lactide was polymerized generally faster than rac- and L-lactide.
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Source Journal
Polymer Chemistry
CiteScore:
8.6
Self-citation Rate:
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