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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/9878

Title: Role of Dispersion State of Ti Species in Deactivation of MgCl_2-Supported Ziegler-Natta Catalysts
Authors: Taniike, Toshiaki
Wada, Toru
Kouzai, Iku
Takahashi, Shougo
Terano, Minoru
Keywords: role of dispersion state of Ti species
deactivation
MgCl2
supported Ziegler
Natta catalysts
Issue Date: 2010
Publisher: Springer
Magazine name: Macromolecular Research
Volume: 18
Number: 9
Start page: 839
End page: 844
DOI: 10.1007/s13233-010-0914-1
Abstract: Deactivation behaviors of TiCl_3/MgCl_2 model catalysts with molecularly dispersed TiCl_3 were investigated to clarify the role of the dispersion state of the Ti species in the deactivation of MgCl_2-supported Ziegler-Natta (ZN) catalysts for propylene and ethylene polymerization. The propylene and ethylene polymerization activities of clustered Ti species supported on MgCl_2 were about one tenth of those of isolated Ti species, indicative of a significance of the aggregation of Ti species in the deactivation of ZN catalysts for olefin polymerization. Moreover, the time-course depression of the monomer consumption for the clustered Ti species was slower than that for the isolated Ti species in propylene polymerization, while the dispersion state hardly affected the depression rate in ethylene polymerization. The reduction rate of the Ti species was concluded as important for the time-course depression of propylene consumption, while ethylene polymerization was insensitive to the oxidation state of the Ti species.
Rights: This is the author-created version of Springer, Toshiaki Taniike, Toru Wada, Iku Kouzai, Shougo Takahashi, Minoru Terano, Macromolecular Research, 18(9), 2010, 839-844. The original publication is available at www.springerlink.com, http://dx.doi.org/10.1007/s13233-010-0914-1
URI: http://hdl.handle.net/10119/9878
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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