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A Tetrameric Titanium Alkoxide as a Lactide Polymerization Catalyst
Author(s) -
Kim Youngjo,
Verkade John G.
Publication year - 2002
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 - 10.1002/1521-3927(20021001)23:15<917::aid-marc917>3.0.co;2-c
Subject(s) - alkoxide , polymerization , ring opening polymerization , polymer chemistry , lactide , homonuclear molecule , titanium , materials science , solution polymerization , bulk polymerization , chemistry , catalysis , polymer , radical polymerization , organic chemistry , molecule
The tetrameric titanium alkoxide (MeC(CH 2 ‐ μ 3 ‐O)(CH 2 ‐ μ ‐O) 2 ) 2 Ti 4 (O‐ i ‐Pr) 10 ( 1 ) catalyzes the ring‐opening polymerization (ROP) of lactide (LA) in toluene solution at various polymerization temperatures, and its bulk ROP at 130°C. Compound 1 facilitated reasonably controlled polymerization characteristics via a coordination/insertion mechanism in solution, whereas the bulk polymerization products displayed broad molecular‐weight distributions. The stereochemical microstructure of PLA was determined from homonuclear decoupled 1 H NMR spectroscopic studies.