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Synthesis and characterization of a bifunctional ion exchange resin with polystyrene‐immobilized diphosphonic acid ligands
Author(s) -
Alexandratos Spiro D.,
Trochimczuk Andrzej W.,
Horwitz E. Philip,
Gatrone Ralph C.
Publication year - 1996
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/(sici)1097-4628(19960711)61:2<273::aid-app9>3.0.co;2-m
Subject(s) - divinylbenzene , bifunctional , chemistry , polymer chemistry , polystyrene , sulfonic acid , copolymer , styrene , isopropyl , polymer , nitric acid , ion exchange , chemical modification , reagent , organic chemistry , catalysis , ion
A new ion exchange resin for the selective complexation of metal ions has been synthesized by functionalizing vinylbenzyl chloride‐styrene‐divinylbenzene copolymer beads with the sodium salt of tetra(isopropyl) methylene diphosphonate. The effects of bifunctionality, matrix rigidity, degree of functionalization, and macroporosity on final resin properties have been quantified. A sulfonic acid‐diphosphonic acid bifunctional resin is highly selective with rapid complexation kinetics. A macroporous polymer matrix crosslinked with 10% divinylbenzene provides optimum results; for example, 99.7% Eu(III) is complexed from a 1 M nitric acid solution with a 30‐min contact time. The importance of physical crosslinking as well as chemical crosslinking in limiting access of substrates into polymer‐supported reagents is discussed. © 1996 John Wiley & Sons, Inc.