Abstract
The geometry of a catalyst support has a strong influence on the catalytic activity of heterogeneous metallocene catalysts for polymerization of α-olefins and styrene. In this study, the catalytic activities of Cp*Ti(OCH3)3/MAO catalyst for styrene polymerization to syndiotactic polystyrene (sPS) have been investigated using three different types of support materials with different geometries: flat surface derived from a silicon wafer, cylindrical pores in silica nanotube reactor arrays, and random tortuous and interconnected pores in porous silica particles. With the same catalyst immobilization technique applied to these support materials, the highest titanium loading per unit support surface area has been obtained with a flat surface catalyst whereas porous silica particles of 15 nm average pore size has the lowest titanium loading per pore surface area. The metallocene catalyst supported on a flat silica surface also exhibited the highest catalyst activity per mole of titanium among different types of...
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