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Structural development Of TMMA and SSQXN‐8 as porous chelating resins
Author(s) -
Ibrahim Gehan M.,
Ahmad Mohamed I.,
ElGammal Belal
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.30042
Subject(s) - silsesquioxane , suspension polymerization , kinetics , polymerization , porosity , ion , kinetic energy , diffusion , materials science , fourier transform infrared spectroscopy , polymer chemistry , chemistry , analytical chemistry (journal) , nuclear chemistry , chemical engineering , polymer , thermodynamics , organic chemistry , physics , engineering , quantum mechanics
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, 13 C‐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 m 2 /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. Δ S * 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