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Short-time isoprene polymerization under the action of a titanium–magnesium catalyst

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Abstract

The short-time polymerization of isoprene under the action of a TiCl4/MgCl2−i-Bu3Al heterogeneous catalyst has been investigated. Pulse mixing of the catalyst and monomer in a cylindrical tubular reactor with a certain length followed by ethanol injection has made it possible to carry out polymerization for 0.1−0.7 s. In the first 0.3 s, when there is a considerable rise in the activity of the catalyst, living polymerization of isoprene takes place. In this period, polyisoprene has up to 95% trans-1,4 units. Extending the polymerization time to 0.7 s diminishes the average molar mass of polyisoprene, broadens its molar mass distribution, and decreases the concentration of trans-1,4 units to 83%. The data of this study have been analyzed on the basis of the kinetic continuity of the polymer chain initiation and growth.

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Authors and Affiliations

  1. Ufa Institute of Chemistry, Russian Academy of Sciences, Ufa, Bashkortostan, 450054, Russia

    V. Z. Mingaleev, D. R. Sagitov, A. G. Yaparova, K. S. Chirko, G. R. Mingaleeva & I. A. Ionova

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  1. V. Z. Mingaleev
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  2. D. R. Sagitov
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  3. A. G. Yaparova
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  4. K. S. Chirko
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  5. G. R. Mingaleeva
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  6. I. A. Ionova
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Correspondence to V. Z. Mingaleev.

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Original Russian Text © V.Z. Mingaleev, D.R. Sagitov, A.G. Yaparova, K.S. Chirko, G.R. Mingaleeva, I.A. Ionova, 2017, published in Kinetika i Kataliz, 2017, Vol. 58, No. 4, pp. 394–399.

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Mingaleev, V.Z., Sagitov, D.R., Yaparova, A.G. et al. Short-time isoprene polymerization under the action of a titanium–magnesium catalyst. Kinet Catal 58, 377–382 (2017). https://doi.org/10.1134/S0023158417040140

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  • DOI: https://doi.org/10.1134/S0023158417040140

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