Titanium Complexes Based on Aminodiol Ligands for the Ring-Opening Polymerization of epsilon-Caprolactone, rac-beta-Butyrolactone, and Trimethylene Carbonate
PERUCH, Frédéric
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
PERUCH, Frédéric
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
< Reduce
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
Language
en
Article de revue
This item was published in
Journal of Polymer Science Part A: Polymer Chemistry. 2011, vol. 49, n° 24, p. 5176-5185
Wiley
English Abstract
Several titanium complexes based on aminodiol ligands were tested as initiators for the ring-opening polymerization (ROP) of epsilon-caprolactone under solution and bulk conditions. All complexes were found to be efficient ...Read more >
Several titanium complexes based on aminodiol ligands were tested as initiators for the ring-opening polymerization (ROP) of epsilon-caprolactone under solution and bulk conditions. All complexes were found to be efficient under both conditions. For bulk polymerization at 70 degrees C, high activities were observed (113.3-156.2 g(poly) mmol(cat)(-1) h(-1)) together with controlled molar mass distribution. Kinetic studies revealed controlled polymerization, and the chain propagation was first order with respect to monomer conversion. One complex was also tested for the ROP of rac-beta-butyrolactone and the end-group analysis suggested that ring opening occurs through acyl-oxygen bond cleavage via coordination-insertion mechanism. The microstructure analysis of polymer by (13)C NMR indicates atactic polymer. Another complex was also found to be efficient initiator for the ROP of trimethylene carbonate under solution and bulk conditions. Again, end-group analysis suggests coordination- insertion mechanism.Read less <
English Keywords
titanium complexes
ring-opening polymerization
polyesters
metal-organic catalysts/organometallic catalysts
polycarbonates
Origin
Hal imported