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G. Zaikov (2005)
Active Sites of Polymerization : Multiplicity: Stereospecific and Kinetic Heterogeneity
T.S. Usmanov, S.I. Spivak, S.M. Usmanov (2004)
Obratnye zadachi formirovaniya molekulyarno-massovykh raspredelenii
ISSN 00125008, Doklady Chemistry, 2010, Vol. 432, Part 1, pp. 148–150. © Pleiades Publishing, Ltd., 2010. Original Russian Text © E.V. Yanborisov, S.I. Spivak, V.M. Yanborisov, Yu.B. Monakov, 2010, published in Doklady Akademii Nauk, 2010, Vol. 432, No. 3, pp. 347–349. CHEMISTRY Calculation of Molecular Weight Distributions of Polymers Synthesized on Multisite Catalytic Systems E. V. Yanborisov, S. I. Spivak, V. M. Yanborisov, and Academician Yu. B. Monakov Received November 24, 2009 DOI: 10.1134/S0012500810050083 Multisite catalysts, in particular, some Ziegler– deemed constant within the time interval [0; t], which Natta diene polymerization catalysts [1], are charac is valid only for systems in which there are no transfor terized by the presence of catalytic active sites of sev mations of active sites. In cases where polymerization eral types. Active sites of each type produce macro is accompanied by, e.g., deactivation of active sites [2, molecules with individual molecular weight distribu 4], certain errors are introduced in the calculated tion. It depends on the kinetic parameters of reactions molecular weight distribution. of chain propagation and chain transfer for various In this work, we calculate the dependence of the agents, with these kinetic parameters being specific for molecular weight distribution on the
Doklady Chemistry – Springer Journals
Published: May 20, 2010
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