Amidoximation and characterization of new complexing hydrogels prepared from N-vinyl 2-pyrrolidone/acrylonitrile systems

Solutions, obtained from the mixture of different mole ratios of N-vinyl 2- pyrrolidone and acrylonitrile, were irradiated in a Co-60-gamma source to p roduce copolymers. The swelling percentage curves were formed, and a diffus ion exponent was calculated. For the uranyl ion adsorption, these copolymer s were reacted with hydroxylamine hydrochloride to convert C=N groups to -C =N-OH (amidoxime) groups. The optimum amidoximation time was determined by uranyl ion adsorption. The structure of copolymers, before and after amidox imation, was analyzed with spectroscopic and thermal methods.