Seyed Mehdi Ghafelebashi - National Petrochemical Company, Petrochemical Research and Technology Company, Tehran, Iran
Fatemeh Shahsavari - National Petrochemical Company, Petrochemical Research and Technology Company, Tehran, Iran
Mahmoud Daneshgar - National Petrochemical Company, Petrochemical Research and Technology Company, Arak, Iran
Farideh Azimfar - National Petrochemical Company, Petrochemical Research and Technology Company, Tehran, Iran

This article describes a highly properties of MgCl۲-supported Ziegler-Natta catalyst using in ethylene polymerization. Catalyst immobilization was performed on anhydrous MgCl۲.The effect of initial preparation on final product was investigated. Scanning electron micrpscopy showed that the catalyst particles exhibit an amorphous shape. In addition, polymerization of ethylene was carried out using the supported catalyst, triethylaluminium as a cocatalyst in slurry phase. According to the obtained results, it was found the heterogeneous catalyst displayed high activity, high bulk density and excellent hydrogen sensitivity. The polyethylene produced by the catalyst has a narrow particle size distribution with a low fine powder content which competitive with traditional grades.

Ziegler Natta catalyst; polyethylene; MgCl۲; polymerization; heterogeneous catalyst