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Yttrium Complexes as Catalysts for Living and Immortal Polymerization of Lactide to Highly Heterotactic PLA
Author(s) -
Amgoune Abderramane,
Thomas Christophe M.,
Carpentier JeanFrançois
Publication year - 2007
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200600862
Subject(s) - yttrium , catalysis , lactide , polymer , polymerization , stereoselectivity , alkoxy group , alcohol , chemistry , macromolecule , polymer chemistry , combinatorial chemistry , organic chemistry , materials science , biochemistry , oxide , alkyl
Amino‐alkoxy‐bis(phenolate) yttrium complexes act in the presence of an excess of alcohol (up to 50 equiv. vs. Y) as highly active and stereoselective catalysts for rac ‐lactide and rac ‐ β ‐butyrolactone polymerizations. These versatile systems enable the production of large quantities of polymer with small amounts of catalyst, optimizing productivity, and also allow the preparation of polymers with functional end groups, which may be employed as intermediates for macromolecular engineering applications.