EVALUATION OF THE DIMETHYLSILYL-BIS(2-METHYL-4-PHENYL-1-INDENYL) LIGAND WITH GROUP-4 TRIAD METALS IN PROPENE POLYMERIZATIONS WITH METHYLALUMINOXANE

Authors
EWEN JA ZAMBELLI A LONGO P SULLIVAN JM
Citation
Ja. Ewen et al., EVALUATION OF THE DIMETHYLSILYL-BIS(2-METHYL-4-PHENYL-1-INDENYL) LIGAND WITH GROUP-4 TRIAD METALS IN PROPENE POLYMERIZATIONS WITH METHYLALUMINOXANE, Macromolecular rapid communications, 19(1), 1998, pp. 71-73
Citations number
7
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecular rapid communications → ACNP
ISSN journal
10221336
Volume
19
Issue
1
Year of publication
1998
Pages
71 - 73
Database
ISI
SICI code
1022-1336(1998)19:1<71:EOTDL>2.0.ZU;2-G
Abstract
Dimethylsilyl-bis(2-methyl-4-phenyl-1-indenyl)MCl2 (M = Ti, Zr, Hf) co mplexes in combination with methylaluminoxanes produce isotactic polyp ropene. The Ti catalysts produce isotactic polypropene which is more s tereoregular than that obtained with traditional, heterogeneous cataly sts. Zr produces low molecular weight, weakly isotactic waxes at pheno menal rates greater than 32 . 10(6) gPP/[(mol catalyst) . h . (mol/l m onomer)]. Hf produces long, softer isotactic chains with good activiti es.