Rapid evaluation of catalysts and MAO activators by kinetics:What controls polymer molecular weight and activity in metallocene/MAO catalysts?

Ghiotto, Fabio, Pateraki, Chrysoula, Severn, John R., Friederichs, Nic and Bochmann, Manfred ORCID: https://orcid.org/0000-0001-7736-5428 (2013) Rapid evaluation of catalysts and MAO activators by kinetics:What controls polymer molecular weight and activity in metallocene/MAO catalysts? Dalton Transactions, 42 (25). pp. 9040-9048. ISSN 1477-9226

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Abstract

The influence of methylaluminoxane (MAO) catalyst activators of different concentrations and preparative histories on the performance of 1-hexene polymerisations was investigated by kinetic methods, using rac-Me Si(2-Me-Benz[e]Ind)ZrCl as the standard catalyst precursor. Fast sampling and analysis allow the time dependence of monomer conversion and the growth of the number-average polymer molecular weight to be determined at a sufficiently short timescale to make this a feasible method for routine catalyst evaluation. Differences in productivity, polymer molecular weight and active species count are shown to be primarily a linear function of the trimethylaluminium concentration. The results in toluene and heptane as solvents are compared; the data show that the inferior performance in heptane is due to a substantially lower active species concentration.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Chemistry Faculty of Science
UEA Research Groups:	Faculty of Science > Research Groups > Synthetic Chemistry (former - to 2017) Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Chemistry of Materials and Catalysis
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	Pure Connector
Date Deposited:	09 Jul 2013 08:54
Last Modified:	24 Oct 2022 04:26
URI:	https://ueaeprints.uea.ac.uk/id/eprint/42956
DOI:	10.1039/c3dt00107e

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