Journal
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume 46, Issue 16, Pages 5363-5370Publisher
WILEY
DOI: 10.1002/pola.22835
Keywords
aliphatic polyesters; biocompatible; biodegradable; block copolymers; potassium catalyst; ring opening polymerization
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Funding
- EU [MEIF-CT-2005-010447]
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Biodegradable, triblock poly(lactide)-block-poly(epsilon-caprolactone)-block-poly (lactide) (PLA-b-PCL-b-PLA) copolymers and 3-star-(PCL-b-PLA) block copolymers were synthesized by ring opening polymerization of lactides in. the presence of poly(epsilon-caprolactone) diol or 3-star-poly(epsilon-caprolactone) triol as macroinitiator and potassium hexamethyldisilazide as a catalyst. Polymerizations were carried out in toluene at room temperature to yield monomodal polymers of controlled molecular weight. The chemical structure of the copolymers was investigated by H-1 and C-13-NMR. The formation of block copolymers was confirmed by NMR and DSC investigations. The effects of copolymer composition and molecular structure on the physical properties were investigated by GPC and DSC. (C) 2008 Wiley Periodicals, Inc.
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