Structural development Of TMMA and SSQXN-8 as porous chelating resins



Superfast kinetics of Nd+3, Eu+3, and Gd+3 ions were studied on the surfaces of N,N,N\,N\-tetramethylmalonamide (TMMA) and silsesquioxane (SSQXN-8) resins. TMMA and SSQXN-8 were prepared by suspension polymerization and sol–gel routes, respectively. They were identified using elemental analysis, FTIR, H-NMR, 13C-NMR, MIP, and BET surface area. Kinetic investigations were performed in batch conditions and different models were used to fit the data; Boyd and Helfferich models were found the best. The diffusion of the ions through the resins were very fast and found to be in the order of 10−16 m2/S. Effective diffusions of the studied ions were found to be 10−15 order of magnitude and directly proportional to the kinetic energy of the transition state. ΔS* values from −166.044 to −179.297 J mol−1 K−1 were estimated as entropy stability factors of the system. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009