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Unusual Influence of the Preparation Conditions of Neodymium–Magnesium Catalyst Systems on Their Stereospecificity in Butadiene Polymerization

Unusual Influence of the Preparation Conditions of Neodymium–Magnesium Catalyst Systems on Their... Doklady Chemistry, Vol. 384, Nos. 1–3, 2002, pp. 129–131. Translated from Doklady Akademii Nauk, Vol. 384, No. 1, 2002, pp. 62–64. Original Russian Text Copyright © 2002 by Duvakina, Monakov. CHEMISTRY Unusual Influence of the Preparation Conditions of Neodymium–Magnesium Catalyst Systems on Their Stereospecificity in Butadiene Polymerization N. V. Duvakina and Academician Yu. B. Monakov Received January 15, 2002 Catalyst systems based on complexes of lanthanide from 95 to 85–88% due to an increase in the amount of halides combined with organoaluminum compounds 1,2-structures (the cis-1,4-units being totally absent). induce the formation of cis-1,4-polydienes, this ste- The content of trans-1,4-units in polybutadiene some- reospecificity remaining unchanged over a broad range what decreases in the following series of solvents used: of Al/Ln component ratios irrespective of the order in chlorobenzene > toluene > cyclohexene. which the components are mixed when the catalyst sys- In a study of butadiene polymerization in cyclohex- tem is prepared or the nature of the solvent used in ane, the change in the order of addition of the catalyst polymerization [1–5]. It was found that replacement of components to the solution of butadiene (either the the organic compound of a non-transition metal, i.e., magnesium component before http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Doklady Chemistry Springer Journals

Unusual Influence of the Preparation Conditions of Neodymium–Magnesium Catalyst Systems on Their Stereospecificity in Butadiene Polymerization

Duvakina, N.; Monakov, Yu.
Doklady Chemistry , Volume 384 (3) – Oct 10, 2004
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References (2)

Publisher
Springer Journals
Copyright
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
0012-5008
eISSN
1608-3113
DOI
10.1023/A:1015526827810
Publisher site
See Article on Publisher Site

Abstract

Doklady Chemistry, Vol. 384, Nos. 1–3, 2002, pp. 129–131. Translated from Doklady Akademii Nauk, Vol. 384, No. 1, 2002, pp. 62–64. Original Russian Text Copyright © 2002 by Duvakina, Monakov. CHEMISTRY Unusual Influence of the Preparation Conditions of Neodymium–Magnesium Catalyst Systems on Their Stereospecificity in Butadiene Polymerization N. V. Duvakina and Academician Yu. B. Monakov Received January 15, 2002 Catalyst systems based on complexes of lanthanide from 95 to 85–88% due to an increase in the amount of halides combined with organoaluminum compounds 1,2-structures (the cis-1,4-units being totally absent). induce the formation of cis-1,4-polydienes, this ste- The content of trans-1,4-units in polybutadiene some- reospecificity remaining unchanged over a broad range what decreases in the following series of solvents used: of Al/Ln component ratios irrespective of the order in chlorobenzene > toluene > cyclohexene. which the components are mixed when the catalyst sys- In a study of butadiene polymerization in cyclohex- tem is prepared or the nature of the solvent used in ane, the change in the order of addition of the catalyst polymerization [1–5]. It was found that replacement of components to the solution of butadiene (either the the organic compound of a non-transition metal, i.e., magnesium component before

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Doklady Chemistry – Springer Journals

Published: Oct 10, 2004

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