Stereoselective ring-opening polymerization of D,L-lactide, initiated by aluminum isopropoxides bearing tridentate nonchiral schiff-base ligands

Matsubara K; Terata C; Sekine H; Yamatani K; Harada T; Eda K; Dan M; Koga Y; Yasuniwa M

Journal of Polymer Science Part A: Polymer Chemistry, Vol.50, No.5, 957-966, 2012

Matsubara K, Terata C, Sekine H, Yamatani K, Harada T, Eda K, Dan M, Koga Y, Yasuniwa M

Ring-opening polymerization of D,L-lactide was stereoselectively achieved using newly designed aluminum alkoxide complexes as initiators. These half-SALEN aluminum complexes bearing tridentate nonchiral Schiff-base ligands are racemates, which provide chirality in the aluminum centers, efficiently afforded a stereoblock copolymer of D,L-LA. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012

Keywords:aluminum Schiff-base complexes;lactide;polyesters;ring-opening polymerization;stereospecific polymers