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Title: Late transition metal catalysts for olefin polymerization
Authors: VELINA
Keywords: Gibson, Brookhart, Olefin Polymerization, Catalyst Immobilization, Clay Support, Polyethylene-Clay Composite
Issue Date: 5-May-2008
Citation: VELINA (2008-05-05). Late transition metal catalysts for olefin polymerization. ScholarBank@NUS Repository.
Abstract: This thesis reports the synthesis, characterizations, catalytic studies, and immobilization of amino phenyl functionalized Gibson-type pyridine bis(imine) iron and Brookhart-type N1-diimine nickel catalysts. The activities of the iron complexes were found to be much higher than those of the nickel complexes in ethylene polymerization. The new catalyst family produced higher molecular weight polymers, yet displayed lower catalytic activities, than previously reported analogous catalysts. Upon quarternization of the amino groups, complex (8c) was supported onto a clay support by cation exchange. The supported catalyst formed polyethylene-clay composites by intercalative polymerization. From the XRD and TGA results, we concluded that an intercalated structure was formed. Compared to its homogeneous catalyst counter part, the supported catalyst was found to be less active.
Appears in Collections:Master's Theses (Open)

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