Metallocenes and post-metallocenes immobilized on ionic liquid-modified silica as catalysts for polymerization of ethylene

• The SIL systems with metallocenes and post-metallocenes were synthesized.
• FTIR, 29Si NMR, N2 adsorption, EA, AAS, TG, and SEM techniques were used for analysis.
• The system with Cp2TiCl2 was the most active in ethylene polymerization.
• The PE properties can be tailored by reaction conditions.
• Olefin polymerization as well as application of variety of catalysts is possible.

The supported ionic liquid (SIL) strategy was used for the first time to metallocene and post-metallocene heterogeneous catalysts for olefin polymerization. The metal complexes: Cp2TiCl2, Cp2ZrCl2, FI–Ti, and Sal–Ti were immobilized in the 1-(3-triethoxysilyl)propyl-3-methylimidazolium alkylchloroaluminate ionic liquid, anchored on the surface of the mesoporous amorphous silica. The SIL systems were characterized by FTIR, 29Si NMR, N2 adsorption, EA, AAS, TG, and SEM techniques. The developed supported catalytic systems were found to be active in the ethylene polymerization and produce the polyethylene of various properties.

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