ISSN:
0887-624X
Schlagwort(e):
zirconocene
;
Ziegler-Natta catalysts
;
stereospecific olefin polymerization
;
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Propylene was polymerized by binary zirconocenium catalysts derived from rac-ethylenebis(1-η5-indenyl)dimethylzirconium and cation forming agents (C6H5)3C+(C6F5)4B- and (C6F5)3B. Polymerizations were also performed with the ternary systems of Et[Ind]2ZrCl2, Et3Al, and the cation forming agents. The catalyst systems, with the inert noncoordinating counter-ion, (C6F5)4B-, have much higher activity and stereoselectivity than the ones with the CH3B-(C6F5)3 counter-ion. Much less active still are catalysts having BF4- or (C6H5)4B- counter-ions. Similar but smaller effects of counter-ion structure on ethylene polymerization were observed. © 1994 John Wiley & Sons, Inc.
Zusätzliches Material:
2 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pola.1994.080321219
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