Polyacrylamide-Grafted Silica as Special Type of Polymer-Colloid Complex

Structure and properties of polyacrylamide-grafted silica have been investigated with the help of thermal analysis methods, NMR spectroscopy and by measuring the ability solubilization in benzene when compared with homopolymer polyacrylamide (PAA). More homogeneous structure, low rigidity and density of packing have been revealed for the polymer shell. PAA form a dense polymer shell, which interact with silica surface through H-bonds. ¹H NMR spectroscopy suggests no influence of silica particles on PAA stereoregularity. PAA-grafted silica considered as a special type of polymer-colloid complex where polymer chains are covalently bound to silica with one end and polymer segments along the chain are hydrogen bound to the particle surface.