Neodymium-based catalysts are broadly used in industry for production of cis-1,3-polybutadiene. However, certain details of polymerization mechanism remain unclear. Only scarce data exist on the degree of activation of Nd-precatalyst and nature of inactive Nd-containing species. In this work, we studied influence of structure of neodymium carboxylates on the activity of the respective ternary catalytic systems Nd(RCOO)3–AlR3–R2AlCl in 1,3-butadiene polymerization. Having found a correlation between substitution in the carboxylate moieties and activity of the Nd-catalyst, we then developed a method for determination of the number of active sites by titration with a poisoning agent. This technique made it possible to study effects of various conditions of preparation of the catalytic system on the polymerization activity and molecular weight distribution of the 1,3-polybutadiene obtained.

Influence of neodymium coordination environment in ternary catalysts Nd(RCOO)3–AlR3–R2AlCl on the activity in 1,3-butadiene polymerization: Titration of the active sites with a poisoning agent

255th National Meeting (2018)

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