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In spite of great commercial importance of the Phillips CrOx/SiO2 catalyst and long term research efforts, the precise physicochemical nature of active sites and polymerization mechanisms still remains unclear. The difficulties in a clear mechanistic understanding of this catalyst mainly come from the complexity of the surface chemistry of the amorphous silica gel support. In this work, novel silsesquioxane-supported...
Nowadays, the Phillips CrOx/SiO2 catalyst is still attracting interest from both industrial and academic fields owing to its unique characteristics for HDPE production. Compared with other industrial catalysts for ethylene polymerization, the Phillips catalyst can be activated by ethylene monomer, CO or Al-alkyl cocatalyst after a simple calcination process (thermal activation). In this work, a brief...
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