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Deviation from Single‐Site Behavior in Zirconocene/MAO Catalyst Systems, 2. Influence of Polymerization Temperature
Author(s) -
Frauenrath Holger,
Keul Helmut,
Höcker Hartwig
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20011201)202:18<3551::aid-macp3551>3.0.co;2-2
Subject(s) - polymerization , molar mass distribution , polymer chemistry , catalysis , chemistry , coordination polymerization , solution polymerization , organic chemistry , polymer
The effect of polymerization temperature on the polymerization of 1‐hexene with the catalyst systems Cp 2 ZrCl 2 /MAO, Me 2 SiCp 2 ZrCl 2 /MAO, EtInd 2 ZrCl 2 /MAO, Me 2 SiInd 2 ZrCl 2 /MAO and i PrCpFluZrCl 2 /MAO is investigated in this paper. The molecular weight and the molecular weight distribution of poly(1‐hexene) provide experimental evidence for a deviation from single‐site behavior at certain polymerization temperatures, depending on the catalyst system. Experimental results are interpreted in terms of different active species prevailing at different polymerization temperatures, and coexisting under certain reaction conditions.