S. Chakravarti et al., Kinetic study of olefin polymerization with a supported metallocene catalyst. IV. Comparison of bridged and unbridged catalyst in cas phase, J APPL POLY, 81(6), 2001, pp. 1451-1459
A kinetic study of ethylene/1-hexene (E/1-H) copolymerization is conducted
with a supported bridged metallocene catalyst in a gas phase reactor. The i
nvestigation into the kinetics of ethylene/1-hexene copolymerization includ
es the effects of operational parameters such as the reaction temperature,
pressure, and comonomer concentration. On-line perturbation techniques are
implemented to determine key kinetic parameters such as the activation ener
gies for propagation and catalyst deactivation. A comparison of the kinetic
parameters and behavior is made between the bridged and a previously studi
ed unbridged catalyst. Finally, a two-site model is proposed to explain the
observed kinetic behavior with changing reaction temperature and comonomer
concentration. (C) 2001 John Wiley & Sons, Inc.