To improve the physical and chemical properties of polyacrylonitrile, acrylonitrile monomer was copolymerized with the various mole percentage of modifers, N-vinylpyrrolidone, glycidylmethacrylate and N-beta-hydroxyethyl methacrylamide. Effects on moisture regain, antistatic properties, tensile strength and acid dyeability were examined. -- AATA