The Influence of co-catalyst in the Polymerization of 1,3-butadiene Catalyzed by Neodymium Chloride Tripentanolate
Abstract: Triisobutylaluminum (TIBA), triethylaluminum (TEA), diisobutylaluminum hydride (DIBAH) and methylaluminoxane (MAO) were evaluated as activators of neodymium chloride tripentanolate catalyst in order to investigate their influence over the catalytic activity, macro- and microstructure, and thermal properties of of resulting polybutadienes. The higher catalytic activities were achieved by TEA and TIBA as co-catalysts, whereas TIBA and DIBAH led to the polymers with highest cis-1,4 structure content with 98.4 and 97.3% respectively. The catalytic activity was remarkably poor with MAO as co-catalyst, as well as low stereocontrol. Number average molecular weight values were observed in the range of 260 to 720 kg/mol.
Main Authors: | , , , , , , , , |
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Format: | Digital revista |
Language: | English |
Published: |
Sociedad Química de México A.C.
2016
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Online Access: | http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1870-249X2016000300141 |
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Summary: | Abstract: Triisobutylaluminum (TIBA), triethylaluminum (TEA), diisobutylaluminum hydride (DIBAH) and methylaluminoxane (MAO) were evaluated as activators of neodymium chloride tripentanolate catalyst in order to investigate their influence over the catalytic activity, macro- and microstructure, and thermal properties of of resulting polybutadienes. The higher catalytic activities were achieved by TEA and TIBA as co-catalysts, whereas TIBA and DIBAH led to the polymers with highest cis-1,4 structure content with 98.4 and 97.3% respectively. The catalytic activity was remarkably poor with MAO as co-catalyst, as well as low stereocontrol. Number average molecular weight values were observed in the range of 260 to 720 kg/mol. |
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