화학공학소재연구정보센터
Journal of Applied Polymer Science, Vol.111, No.6, 3039-3049, 2009
Copolymer Resin. VII. 8-Hydroxyquinoline-5-sulfonic Acid-Thiourea-Formaldehyde Copolymer Resins and Their Ion-Exchange Properties
8-Hydroxyquinoline-5-sulfonic acid-thiourea-formaldehyde copolymer resins were synthesized through the condensation of 8-hydroxyquinoline-5-Sulfonic acid and thiourea with formaldehyde in the presence of hydrochloric acid as a catalyst and with various molar ratios of the reacting monomers. The resulting copolymers were characterized with UV-visible, IR and H-1-NMR spectral data, employed to determine the reactivity of monomers. The average molecular weights of these resins were determined with vapor pressure osmometry and conductometric titration in a nonaqueous medium. The chelation ion-exchange properties were also studied with the batch equilibrium method. The resins were proved to be selective chelating ion-exchange copolymers for certain metals. The chelation ion-exchange properties of these copolymers were Studied for Cu2+, Ni2+, Co2+, Pb2+, and Fe3+ ions. The study was carried out over a wide pH range and in media of various ionic strengths. The copolymers showed a higher selectivity for Fe3+ ions than for Cu2+, Ni2+, Co2+, and Pb2+ ions. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 3039-3049, 2009