Nitroxide-Mediated Copolymerization of Methacrylic Acid and Styrene To Form Amphiphilic Diblock Copolymers
Macromolecules2007Vol. 40(6), pp. 1897–1903
Citations Over TimeTop 10% of 2007 papers
Abstract
The controlled free-radical polymerization of methacrylic acid was performed at 73 and 83 °C using a methacrylic acid-based alkoxyamine and the nitroxide SG1 as a mediator in the presence of a small concentration of styrene, without protection of the carboxylic acid groups. The solvent was 1,4-dioxane or ethanol, and no chain transfer to the solvent could be detected. Because of the presence of styrene, the polymerization exhibited the characteristics of a living one. In particular, the polymers could be chain-extended and were used as efficient macroinitiators in the polymerization of styrene, allowing well-defined, amphiphilic diblock copolymers to be synthesized.
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