Abstract
Abstract The synthesis of polymeric quaternary ammonium salts linked 1,8-diazabicyclo[5.4.0]undec-7-ene(DBU) to chloromethylated polystyrenes is described. The polymers so obtained become anion exchangers with both quaternary ammonium and tertiary amino groups. The values of the total ion-exchange capacities indicated that the quaternization of the tertiary amino groups on the polymers with hydrochloric acid is difficult. The chloride forms of the resins, in spite of their bulky and steric quaternary ammonium groups containing DBU, were effective as ion exchangers for a variety of bulky anions such as sulfate, oxalate, hexacyanoferrate(II), hexacyanoferrate(III), and tris(oxalato) ferrate(III) ions. The free base forms of the resins gave low reactivity for chloride and sulfate ions. Some examples of the application of the resins is also reported.
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