شماره ركورد كنفرانس :
5048
عنوان مقاله :
Investigation of Different Ziegler-Natta Catalysts for Propylene Polymerization
Author/Authors :
Ali ،Dashti Faculty of Engineering - Shahid Bahonar University of Kerman, Iran , Ahmad ،Ramazani S. A Chemical Engineering and Petroleum Department - Sharif University of Technology, Tehran, Iran , Yuichi ،Hiraoka School of Materials Science - Japan Advanced Institute of Science and Technology - Asahidai - Nomi - Ishikawa, Japan , Toshiaki ،Taniike School of Materials Science - Japan Advanced Institute of Science and Technology - Asahidai - Nomi - Ishikawa, Japan , Minoru ،Terano School of Materials Science - Japan Advanced Institute of Science and Technology - Asahidai - Nomi - Ishikawa, Japan
كليدواژه :
Kinetic study , Zeigler-Natta catalyst , propylene polymerization , plausible model
عنوان كنفرانس :
ششمين كنگره بين المللي مهندسي شيمي
چكيده لاتين :
Kinetic studies of different MgCl2-supported Ziegler-Natta (ZN) catalysts are carried out during propylene
polymerization in slurry phase. Three main procedures for preparing various MgCl2-supported ZN catalysts including
grinding, solution and chemical reaction methods are applied and consequently polymerization kinetic profiles are
investigated. Because of different spatial active sites distribution of various ZN catalysts, individual kinetic nature is
shown by any catalyst system. Kinetic profiles of the ZN catalysts synthesized by grinding and solution methods show
high initial activity with rapid decay, while that of ZN catalyst prepared with chemical reaction method shows low
initial activity with slow decay. In each catalyst system, a plausible model is presented to explain the difference of
polymerization kinetic nature based on morphological studies of catalyst and produced polymer particles as well as the
effect of catalyst preparation method on distribution of spatial active sites on catalyst surface.
