POSTGRAFTING OF HYPERBRANCHED DENDRITIC POLYMER FROM TERMINAL AMINO GROUPS OF POLYMER CHAINS GRAFTED ONTO SILICA SURFACE
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説明
This paper describes postgrafting of hyperbranched dendritic polyamidoamine initiated from terminal amino groups of polymer chains grafted onto ultrafine silica surface in order to modify the silica surface. Surface grafting of polymer having terminal amino groups as initiator sites was performed by a reaction of terminal diamine-type polyoxyethylene with epoxy groups previously introduced onto the surface by 3-glycidoxypropyltri-methoxysilane treatment. The postgrafting reaction of dendritic polyamidoamine from the terminal amino groups was achieved by repeating the Michael addition of methyl acrylate to amino groups followed by amidation of the resulting ester moieties with ethylenediamine or hexamethylenediamine. Both the amount of amino groups and the percentage of postgrafting of the resulting polyamidoamine increased with an increase in the number of generations: the amino group content increased from 0.40 mmol/g to 2.68 mmol/g, and the percentage of postgrafting reached 61.0% after the 12th generat...
収録刊行物
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- Journal of Macromolecular Science, Part A
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Journal of Macromolecular Science, Part A 37 357-377, 2000-03-22
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