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- W2013776722 abstract "New zinc β-diiminate complexes are covalently immobilized on silica supports of different pore sizes and structures and the resulting catalysts are evaluated in the catalytic polymerization of lactide. The homogeneous complexes effectively polymerize lactide to produce high molecular weight polylactic acid (PLA) with a narrow polydispersity. The immobilized catalysts also readily convert lactide; however, only oligomeric products with moderate molecular weights are produced when the complexes are immobilized on porous silica. Control experiments indicate that surface silanols may play an important role in modulating the molecular weight of the PLA, with the surface hydroxyl groups acting as chain-transfer agents. High molecular weight, relatively monodisperse polymer can be obtained using a nonporous supported catalyst." @default.
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- W2013776722 date "2004-03-10" @default.
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- W2013776722 title "Elucidating the role of silica surfaces in the ring-opening polymerization of lactide: catalytic behavior of silica-immobilized zinc β-diiminate complexes" @default.
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- W2013776722 doi "https://doi.org/10.1016/j.jcat.2003.12.004" @default.
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