view:41511 Last Update: 2024-1-30
Ebrahim Ahmadi, Zahra Mohamadnia, Asemeh Mashhadi-Malekzadeh,
Zahra Hamdi, Fatemeh Saghatchi
Preparation, Characterization, and Polymerization of Chromium Complexes-Grafted Al/SBA-15 and Ti/SBA-15 Nanosupports |
Ethylene polymerization catalysts have been prepared by grafting chromium (III) nitrate onto Al/SBA-15 and Ti/SBA-15 mesoporous materials. A combination of XRD, nitrogen adsorption, TEM, and inductively coupled plasma-atomic emission spectroscopy (ICP-AES), were used to characterize the catalysts. Polymerization activity of Cr/SBA-15 catalyst is significantly improved by Al or Ti insertion to the supports. Particularly, the chromium catalyst prepared with Ti/SBA-15 support is more active than Al/SBA-15 catalyst. |