Abstract
To obtain polymer-modified silica (550 nm diameter), trimethoxysilyl-terminated poly(glycidyl methacrylate-co-methyl methacrylate) with epoxy ring (to prevent the formation of carboxyl group) was successfully synthesized. Then, the cross-linking of the grafted copolymer on silica was made using ethylenediamine or hexamethylenediamine of varying alkyl chain lengths, and the stability of cross-linked silica particles was investigated in alkaline aqueous solution. Cross-linked polymer-modified silica based on diamines exhibited much lower reduction rate (in wt %) of the attached polymer to silica than uncross-linked polymer-modified silica. In particular, cross-linked silica composites by ethylenediamine had more stability than cross-linked silica composites by hexamethylenediamine. Finally, the cross-linking reaction of grafted-polymer on silica particles by diamines was confirmed by the 13C CP/MAS NMR spectra measured on polymer-modified silica composites.
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Lee, JH., Kim, BS., Lee, JO. et al. Cross-linking of Grafted Copolymer on Colloidal Silica and Introduction of Surface Amino Group. Polym J 39, 1018–1024 (2007). https://doi.org/10.1295/polymj.PJ2007053
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DOI: https://doi.org/10.1295/polymj.PJ2007053
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