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International Journal of Polymer Science
Volume 2016 (2016), Article ID 7239540, 7 pages
Research Article

Synthesis of High cis-1,4-BR with Neodymium for the Manufacture of Tires

1División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Ciudad Madero, J. Rosas y J. Urueta S/N, Colonia Los Mangos, 89440 Cuidad Madero, TAMPS, Mexico
2Repsol YPF Technology Center, Carretera de Extremadura, Km 18, Móstoles, 28931 Madrid, Spain

Received 13 October 2015; Revised 6 February 2016; Accepted 23 February 2016

Academic Editor: Atsushi Sudo

Copyright © 2016 Maria Leonor Méndez-Hernández et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The salt of neodymium has been widely used in industrial polymerization of 1,3-butadiene. We used the ternary catalytic system neodymium versatate/diethylaluminum chloride/triisobutylaluminum (NdV3/DEAC/TIBA) with 0.5 mM NdV3/100 g Bd, NdV3 : DEAC = 1 : 9 mol : mol, and TIBA = 25, 50, 100, and 200 mM. The number-average molecular weight (Mn), weight-average molecular weight (Mw), and polydispersity index (PDI) were analyzed by GPC; the rheological properties were analyzed by DMA. The formulations were prepared with carbon black (IRB6) as reinforcing filler and the mechanical properties were compared to behavior of the different elastomeric compounds. The elastomeric compounds were characterized by their rheological properties, tensile strength, abrasion resistance, tear strength, permanent set, resilience, and fatigue properties. The high cis-1,4 polybutadiene (high cis-1,4-BR) was obtained with a percentage of cis-1,4 ≥97%. The weight-average molecular weight (Mw) was from 150 × 103 to 900 × 103 g/mol and polydispersity index (PDI) was from 3.1 to 5.1. This work is based on evaluation of the effect of the catalyst system on the final properties of the synthesized polybutadiene.