Abstract
In this paper, three basic approaches for the design of active sites on the traditional Ziegler catalysts are discussed for the future breakthrough of this type of catalysts. Firestly, the Variation of isospecific active sites formed on a MgCl2-supported TiCl4 catalyst in the absence or presence of external electron donor was specified by the stopped-flow method based on the isotacticity distribution of the polypropene. Besides the depression of the formation of some aspecific active sites, the effect of addition of external electron donor is to transfer some of the aspecific titanium species into isospecific active site. Secondly, hydrogen dissociation sites were found to be derived from the over-reduced Ti species due to deactivation during propene polymerization. Finally, the enantioselectivity and diastereoselectivity of the active sites for copolymerization of propene and 1, 5- hexadiene were studied. It was made clear that the steric hindrance in the vicinity of active sites increases with the isospecificity of the active sites.
Keywords
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
T. Keii, M. Terano, K. Kimura and K. Ishii, Makromol Chem., Rapid Commun 8, 583 (1987)
M. Terano, T. Kataoka, T. Keii, J. Mol. Catal 56, 203 (1989)
T. Keii, in: Catalyst Design for Tailor-made Polyolefins, K. Soga, and M. Terano (Eds.), Kodansha-Elsevier, Tokyo 1994, p.1
T. Keii, Macromol. Theory Simul 4, 947 (1995)
T. Keii, M. Terano, K. Kimura, K. Ishii, in: Transition Metals and Organometallics as Catalysts for Olefin Polymerization, W. Kaminsky, H. Sinn (Eds.), Springer-Verlag, 1988, pp.1
H. Mori, M. Endo, K. Tashino, M. Terano, J. Mole. Catal. A: Chem 145, 153
(1999)
H. Mori, M. Yamahiro, M. Terano, M. Takahashi, T. Matsukawa, Makromol Chem Phys. 201, 289 (2000)
T. Keii, Y. Doi, E. Suzuki, M. Tamura, M. Murata, K. Soga, Makromol. Chem. 185, 1537 (1984)
H. Mori, H. Yamada, H. Kono, M. Terano, J. Mol. Catal. A, Chem 1997, 125, 81
H. Mori, H. Kono, M. Terano, Macromol. Chem. Phys 2000, 201, 543
H. Mori, K. Tashino, M. Terano, Macromol. Rapid Commun 16, 651 (1995)
G. Natta, Chem. Ind. (Milan) 41, 519 (1959)
K. Soga, T. Shiono, Polym. Bull. (Berlin) 8, 261 (1982)
J.C.W. Chien, C. Kuo, J. Polym. Sci., Part A: Polym. Chem 24, 2707 (1986)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2001 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Kono, H., Tomisaka, M., Matsuoka, H., Liu, B., Terano, M. (2001). Basic Approaches for the Design of Active Sites on the Traditional Ziegler Catalysts. In: Blom, R., Follestad, A., Rytter, E., Tilset, M., Ystenes, M. (eds) Organometallic Catalysts and Olefin Polymerization. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59465-6_16
Download citation
DOI: https://doi.org/10.1007/978-3-642-59465-6_16
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-63987-6
Online ISBN: 978-3-642-59465-6
eBook Packages: Springer Book Archive