Synthesis of poly(vinyl acetate)‐b‐polystyrene and poly(vinyl alcohol)‐b‐polystyrene copolymers by cobalt‐mediated radical polymerization |
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| Authors: | Rayna Bryaskova Nicolas Willet Antoine Debuigne Robert Jérôme Christophe Detrembleur |
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| Institution: | 1. Center for Education and Research on Macromolecules, University of Liège, Sart‐Tilman B6a, 4000 Liège, Belgium;2. Center for Education and Research on Macromolecules, University of Liège, Sart‐Tilman B6a, 4000 Liège, BelgiumCenter for Education and Research on Macromolecules, University of Liège, Sart‐Tilman B6a, 4000 Liège, Belgium |
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| Abstract: | Well‐defined poly(vinyl acetate) macroinitiators, with the chains thus end‐capped by a cobalt complex, were synthesized by cobalt‐mediated radical polymerization and used to initiate styrene polymerization at 30 °C. Although the polymerization of the second block was not controlled, poly(vinyl acetate)‐b‐polystyrene copolymers were successfully prepared and converted into amphiphilic poly(vinyl alcohol)‐b‐polystyrene copolymers by the methanolysis of the ester functions of the poly(vinyl acetate) block. These poly(vinyl alcohol)‐b‐polystyrene copolymers self‐associated in water with the formation of nanocups, at least when the poly(vinyl alcohol) content was low enough. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 81–89, 2007 |
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| Keywords: | amphiphiles block copolymers controlled radical polymerization copolymerization poly(vinyl alcohol) |
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