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Poly(N-isopropylacrylamide-co-3-trimethoxysilylpropyl methacrylate) was prepared by radical polymerization and was grafted onto the surface of spherical colloidal silica. The copolymer, which had on average 1 silyl group per chain, condensed on the silica dispersed in THF at 60°C. The resulting particles had a critical coagulation concentration of calcium chloride of 500 mM at room temperature, indicating...
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