Microwave-Assisted Cationic Ring-Opening Polymerization of 2-Oxazolines: A Powerful Method for the Synthesis of Amphiphilic Triblock Copolymers

阅读量：

作者：

R Hoogenboom，F Wiesbrock，H Huang，MAM Leenen，HML Thijs，SFGM Van Nispen，VDL Michel，CA Fustin，AM Jonas，JF Gohy

展开

摘要：

We report on the first successful example of the preparation of triblock copolymers via a cationic ring-opening polymerization procedure. A library of 30 triblock copolymers was prepared from 2-methyl-, 2-ethyl-, 2-nonyl-, and 2-phenyl-2-oxazoline in a single-mode microwave reactor. The polymers exhibited narrow molecular weight distributions and showed only minor deviations from the targeted monomer ratio of 33:33:33. The glass-transition temperature of the triblock copolymers spanned the range from 50 to 100 degrees C depending on the incorporated monomers. The micellization behavior was investigated for some amphiphilic triblock copoly(2-oxazoline)s containing two hydrophilic and one hydrophobic blocks. The size of the micelles was larger when the hydrophobic block is located at one end of the triblock copoly(2-oxazoline) s, as measured by atomic force microscopy and dynamic light scattering.

展开

关键词：

Dispersion polymerization Emulsion polymerization Polystyrene Polymerization media

DOI：

10.1021/ma060952a

被引量：

218

年份：

2006