A Polymerization Kinetics Comparison between a Metallocene Catalyst Activated by Tetrakis(pentafluorophenyl) Borate and MAO for the Polymerization of Ethylene in a Semi-batch Solution Reactor

作者：Mehdiabadi Saeid; Soares Joao B P^*; Bilbao Daniel; Brinen Jeffrey L

来源：Macromolecular Reaction Engineering, 2011, 5(9-10): 418-430.

DOI：10.1002/mren.201100015

• borate activators
• MAO
• metallocene catalysts
• poly-ethylene
• polymerization kinetics
• polymer reaction engineering

This work investigates the effects of activator species on catalyst reactivity in the semi-batch, solution polymerization of ethylene using rac-dimethylsilyl-bis(indenyl)hafnium dimethyl catalyst. The two activators compared are methylalumoxane and tetrakis(pentafluorophenyl) borate dimethylanilinium salt ([B(C(6)F(5))(4)](-)[Me(2)NHPh](+)). For each of the catalyst/activator systems, monomer and activator concentrationswere varied to gain a basic understanding of polymerization kinetics, allowing for direct comparison of each system. Copolymerization experiments involving 1-octene were also carried out to further investigate the influence of activator type on copolymerization kinetics and products.

• 出版日期2011-10-12