Polymer and Materials Science
Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
Kinetic and polymer analytical results obtained with the systems Me2Si(Ind)2ZrMe2/[B(C6F4Si(i-Pr)3)4]- [(C6H5)3C]+ (2) and Me2Si(Ind)2ZrMe2/[B(C6F5)4]- [(C6H5)3C]+ (3) in olefin polymerizations are compared (Me: methyl; Ind: indenyl). Both systems show that the polymerization rate increases with increasing metallocene concentration in a surplus due to the formation of binuclear species. The expected influence of increasing cation-anion distance on the stereo-errors of the poly(propylene)s when changing from system 3 into system 2 could not be detected.
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