Abstract
The gradient copolymers of styrene and tert-butyl acrylate are synthesized by pseudoliving free-radical polymerization in the presence of TEMPO. Despite the inability of tert-butyl acrylate to undergo polymerization in the presence of the nitroxide TEMPO, the introduction of styrene makes it possible to perform the process under the controlled reversible-inhibition regime. The introduction of an additional high-temperature initiator, cumene hydroperoxide, increases the yield of the copolymer, while the pseudoliving mechanism of the process is preserved. This phenomenon is confirmed by the facts that the concentration of nitroxide remains almost invariable during polymerization and that the molecular mass of the polymerization product increases with conversion. Variations in the composition of the copolymer and its molecular mass during polymerization are evidence that the gradient copolymers are formed.
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Original Russian Text © D.I. Kalugin, M.Yu. Zaremski, V.B. Golubev, E.S. Garina, 2011, published in Russian in Vysokomolekulyarnye Soedineniya, Ser. B, 2011, Vol. 53, No. 6, pp. 943–948.
This work was supported by the Russian Foundation for Basic Research (project no. 08-03-00269a) and State Contract MN 105/10.
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Kalugin, D.I., Zaremski, M.Y., Golubev, V.B. et al. Synthesis of gradient copolymers of styrene and tert-butyl acrylate by pseudoliving radical polymerization mediated by the reversible inhibitor TEMPO. Polym. Sci. Ser. B 53, 307–312 (2011). https://doi.org/10.1134/S1560090411060066
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DOI: https://doi.org/10.1134/S1560090411060066