SEARCH Articles Figures Tables 1 -vinylpyrrolidone-co-styrene 7V-Vinylpyrrolidone A -vinylpyrrolidone Aqueous solution polymerization vinylpyrrolidone Cationic polymerization vinylpyrrolidone Graft copolymerization vinylpyrrolidone N-Vinylpyrrolidone N-Vinylpyrrolidone polymer N-Vinylpyrrolidone, cyanation Poly-TV-vinylpyrrolidone Polymerization conditions vinylpyrrolidone Radical Graft Copolymerization of Vinylpyrrolidone onto Poly(vinylalcohol) Solution polymerization vinylpyrrolidone V-Vinylpyrrolidone Vinyl acetate-vinylpyrrolidone Vinylpyrrolidone polymerization Vinylpyrrolidone-methyl methacrylate Vinylpyrrolidone-methyl methacrylate copolymer Vinylpyrrolidone-vinyl acetate copolymer (Copovidone) Vinylpyrrolidone/styrene copolymer emulsion fluid