Bis-catecholate complexes of the IV group elements in the radical polymerization of styrene: ESR studies |
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| Authors: | L B Vaganova A V Maleeva A V Piskunov D F Grishin |
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| Institution: | 1. Research Institute of Chemistry at the N. I. Lobachevsky Nizhny Novgorod State University, 23 prosp. Gagarina, 603950, Nizhny Novgorod, Russian Federation
2. G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 ul. Tropinina, 603950, Nizhny Novgorod, Russian Federation
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| Abstract: | The main features of the radical polymerization of styrene in the presence of germanium(IV) and tin(IV) bis-catecholate complexes were studied in the temperature range 70?C110 °C. Depending on the initial composition and structure, as well as on the reaction conditions, the complexes used can play the role of inhibitors or regulators directing the polymerization process. The ESR data in the styrene medium showed formation of germanium and tin o-semiquinolate derivatives, that indicates a direct involvement of the organoelement additives into the propagation step. The polymers synthesized in the presence of the bis-catecholate complexes of the IV group elements can be used as macroinitiators of styrene polymerization. |
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