Abstract
The radical polymerization of styrene at 60 and 80°C mediated by benzyl dithiobenzoate and poly(styrene dithiobenzoate) as reversible addition-fragmentation chain-transfer agents has been studied. It has been shown that both agents are characterized by high chain-transfer constants and provide control over molecular-mass characteristics of polymerization products. The number-average molecular mass of polystyrene linearly grows with conversion, and the polymers are characterized by low values of polydispersity indexes. It has been demonstrated that the rate of polymerization significantly decreases with an increase in the concentration of reversible addition-fragmentation chain-transfer agents. This effect is typical of styrene polymerization mediated by dithiobenzoates. The possible reasons for this phenomenon are discussed.
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Original Russian Text © E.V. Chernikova, A.V. Tarasenko, E.S. Garina, V.B. Golubev, 2006, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2006, Vol. 48, No. 10, pp. 1787–1800.
This work was supported by the Russian Foundation for Basic Research, project no. 05-03-33069.
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Chernikova, E.V., Tarasenko, A.V., Garina, E.S. et al. Controlled radical polymerization of styrene mediated by dithiobenzoates as reversible addition-fragmentation chain-transfer agents. Polym. Sci. Ser. A 48, 1046–1057 (2006). https://doi.org/10.1134/S0965545X06100051
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DOI: https://doi.org/10.1134/S0965545X06100051