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Updated: Aug 15, 2026

Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications
Published on: August 28, 2015
Synthesis and rheological properties of polylactide/poly(ethylene glycol) multiblock copolymers
Feng Li1, Suming Li, Michel Vert
1Centre de Recherche sur les biopolymères Artificiels, Faculté de Pharmachie, 15 Avenue Charles Flahault, 34060 Montpellier, France.
Abstract:
Ring-opening polymerization of D,L-lactide was carried out in the presence of poly(ethylene glycol), using Zn powder as catalyst. The hydroxyl-capped PLA-PEG-PLA triblock copolymers were coupled with adipoyl chloride at different molar ratios under mild conditions. N-Dimethylaminopyridine (DMAP) was used as catalyst of the coupling reaction. The resulting PLA/PEG multiblock copolymers were characterized by various analytical techniques such as IR, 1H NMR, SEC, and DSC. Sol-gel transition properties of the multiblock copolymers were investigated by mechanical rheology. The data showed that the sol-gel transition temperature and the transition modulus increased with increasing molecular weight and the solution concentration of the multiblock copolymers. [Graph: see text] Variation of storage modulus (G') and loss modulus (G'') as a function of temperature for a 20% sample of MB3.
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