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Summary: Silica nanotube reactor (SNTR) has been designed and used as a novel catalytic polymerization reactor device to synthesize syndiotactic polystyrene (sPS), and polyethylene with Cp*Ti(OCH3)3 and rac‐Et(indenyl)2ZrCl2 metallocene catalysts in conjunction with methylaluminoxane (MAO). The highly crystalline sPS molecules polymerized within the SNTR form nano‐scale polymeric fibrils of 30–50...
The nascent morphology of semi-crystalline syndiotactic polystyrene (sPS) polymerized over silica-supported pentamethyl cyclopentadienyl titanium trimethoxide (Cp ∗ Ti(OCH 3 ) 3 ) catalyst in a liquid slurry polymerization has been investigated under various reaction conditions. The scanning electron microscopic analysis of nascent polymers reveals that sPS molecules grow as...
The kinetics of syndiospecific polymerization of styrene over silica-supported Cp ∗ Ti(OCH 3 ) 3 /MAO catalyst has been investigated through experimentation and theoretical modeling. At low monomer concentrations, the polymerization rate increases almost linearly with monomer conversion, but the reaction rate becomes independent of monomer concentration at high bulk phase monomer...
The physical transitions and nascent morphology of syndiotactic polystyrene (sPS) synthesized over heterogeneized embedded Cp * Ti(OMe) 3 /MAO catalyst in n-heptane slurry polymerization have been investigated. The homogeneous metallocene catalyst is heterogenized by embedding active titanium sites into an sPS prepolymer phase. At low styrene concentrations, the reaction mixture is...
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