Effect of Physical Factors during the Preparation of a Reaction Mixture in Turbulent Flows on the Rate of Butadiene Polymerization in the Presence of TiCl4-Al(i-C4H9)3 and Molecular Mass Characteristics of Butadiene Rubber
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Butadiene polymerization was used as a model of diene polymerization in the presence of micro-heterogeneous Ziegler-Natta polycentric catalytic systems (TiCl4-Al(i-C4H9)3 catalytic system, toluene solvent, temperature 298 K). It was found that an increase in the rate of feeding of the reaction mixture into a tubular turbulent apparatus of diffuser-confuser design, the ratio of diffuser to confuser diameters, and diffuser opening angle led to a local increase in the kinetic energy and dissipation rate of turbulence; as a consequence, the most probable equivalent radius of the catalyst particles and the average molecular mass of the polymer decreased, while the polymerization rate increased. It was also found that a change in the section length to diffuser diameter ratio when the former or latter was constant and a change in the number of sections of the tubular turbulent apparatus from four to eight did not affect the polymerization rate and the molecular mass characteristics of the polymer.
Keywordsbutadiene rubber molecular mass characteristics of the polymer inverse kinetic problem polymerization rate Ziegler-Natta catalytic system tubular turbulent apparatus
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