Title : ( Similarities and Differences of the Active Sites in Basic and Advanced MgCl2-Supported Ziegler-Natta Propylene Polymerization Catalysts )
Authors: Yuichi Hiraoka , Sang Yull Kim , Ali Dashti , Toshiaki Taniike , Minoru Terano ,
Full TextAbstract
Though preparation procedures of heterogeneous Ziegler-Natta catalysts for propylene polymerization are sophisticated, it is uncertain whether the nature of the active sites is similar or different for different preparation procedures. In this study, the effects of preparation procedures on the nature of the active sites were investigated by stopped-flow polymerization in combination with microstructure analysis of polymers. Both basic and advanced types of catalysts showed the same two kinds of isospecific active site, which indicated little influence of the preparation method on the active site structure. On the contrary, the ratios of the two kinds of isospecific sites were not the same, resulting in variation of average polymer properties.
Keywords
, catalyst preparation procedure; poly(propylene) (PP); stopped, flow polymerization; Ziegler, Natta polymerization
@article{paperid:1032442,
author = {Yuichi Hiraoka and Sang Yull Kim and Dashti, Ali and Toshiaki Taniike and Minoru Terano},
title = {Similarities and Differences of the Active Sites in Basic and Advanced MgCl2-Supported Ziegler-Natta Propylene Polymerization Catalysts},
journal = {Macromolecular Reaction Engineering},
year = {2010},
volume = {4},
number = {8},
month = {August},
issn = {1862-832x},
pages = {510--515},
numpages = {5},
keywords = {catalyst preparation procedure; poly(propylene) (PP); stopped-flow polymerization; Ziegler-Natta polymerization},
}
%0 Journal Article
%T Similarities and Differences of the Active Sites in Basic and Advanced MgCl2-Supported Ziegler-Natta Propylene Polymerization Catalysts
%A Yuichi Hiraoka
%A Sang Yull Kim
%A Dashti, Ali
%A Toshiaki Taniike
%A Minoru Terano
%J Macromolecular Reaction Engineering
%@ 1862-832x
%D 2010
