Kasaeian - Faculty of Chemical Engineering, University of Tehran. Iran polymer and Petrochemical Institute
Torabi Angaji - Faculty of Chemical Engineering, University of Tehran. Iran polymer and Petrochemical Institute
Zohuri - Faculty of Chemical Engineering, University of Tehran. Iran polymer and Petrochemical Institute

In this study, the recent advances in the area of olefin polymerization have been reviewed and the study is allocated to the six generations of Ziegler-Natta catalysts, which have been improved during five recent decades up to now. The focus is on the fifth generation area in which we have started a study for preparing of a new catalyst with diether donors. Beside this, some recent papers about preparing of diether catalysts have been reviewed and the space molecular structure of the diether is presented.

Ziegler-Natta, polymerization, propylene, diether