Initiation of complex-radical polymerization of methyl methacrylate in the presence of metallocenes |
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| Authors: | N. N. Sigaeva A. K. Friesen I. I. Nasibullin N. L. Ermolaev S. V. Kolesov |
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| Affiliation: | 1. Institute of Organic Chemistry, Ufa Research Center, Russian Academy of Sciences, pr. Oktyabrya 71, Ufa, 450054, Bashkortostan, Russia
2. Institute of Applied Physics, Russian Academy of Sciences, ul. Ul??yanova 46, Nizhni Novgorod, 603950, Russia
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| Abstract: | The initiation of radical polymerization of methyl methacrylate in the presence of benzoyl peroxide-metallocene (Cp2Fe, Cp2ZrCl2, and Cp2TiCl2; (C5Me5)2Fe, (C5Me5)2ZrCl2, and (AcC5H4)(C5H5)Fe) systems is studied. It is shown that a metallocene affects the rate of initiation and the initial rate of polymerization. On the basis of quantum-chemical calculations, a new mechanism of the initiation reaction may be advanced: Namely, the decomposition of benzoyl peroxide proceeds via the stage of complexation with a metallocene, while the nature of a metallocene determines the probability of complexation and decomposition. |
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