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Copolymer resin. VII. 8‐hydroxyquinoline‐5‐sulfonic acid–thiourea–formaldehyde copolymer resins and their ion‐exchange properties
Author(s) -
Mane V. D.,
Wahane N. J.,
Gurnule W. B.
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29369
Subject(s) - copolymer , vapor pressure osmometry , thiourea , sulfonic acid , chelation , chemistry , polymer chemistry , formaldehyde , inorganic chemistry , ion exchange , monomer , ion exchange resin , nuclear chemistry , polymer , organic chemistry , ion , vapor pressure
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 1H‐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 Cu 2+ , Ni 2+ , Co 2+ , Pb 2+ , and Fe 3+ 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 Fe 3+ ions than for Cu 2+ , Ni 2+ , Co 2+ , and Pb 2+ ions. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009