A kinetic study of the ethylene-styrene copolymerization in the presence of rac-(ethylenebis(1-indenyl)zirconium dichloride activated by MAO shows the peculiar behavior of this catalytic system that is known to produce crystalline nearly alternating copolymers. Some inferences on the monomer-metal interactions are made on the basis of this study. The parallel investigation on the catalyst based on isopropylidene(l-cyclopentadienyl)(9-fluorenyl)zirconium dichloride allows us to produce a stereoregular nearly alternating ethylene-styrene copolymer also with this catalytic system. The same main tacticity seems to characterize the copolymers obtained with the C-2 and C-s symmetric catalysts in accordance with the generally accepted mechanism of stereocontrol in the l-alkene polymerizations.

Zirconocene-based catalysts for the ethylene-styrene copolymerization: Reactivity ratios and reaction mechanism

DI SERIO, MARTINO
1997

Abstract

A kinetic study of the ethylene-styrene copolymerization in the presence of rac-(ethylenebis(1-indenyl)zirconium dichloride activated by MAO shows the peculiar behavior of this catalytic system that is known to produce crystalline nearly alternating copolymers. Some inferences on the monomer-metal interactions are made on the basis of this study. The parallel investigation on the catalyst based on isopropylidene(l-cyclopentadienyl)(9-fluorenyl)zirconium dichloride allows us to produce a stereoregular nearly alternating ethylene-styrene copolymer also with this catalytic system. The same main tacticity seems to characterize the copolymers obtained with the C-2 and C-s symmetric catalysts in accordance with the generally accepted mechanism of stereocontrol in the l-alkene polymerizations.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/300474
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