Abstract
Abstract Crossinked resin beads containing regions of acidic and basic groups are the preferred structures for the efficient operation of a thermally regenerable ion-exchange process. In the present study they were prepared by polymerizing a heterogeneous mixture of acrylic esters and allylamines. Polymerization of unstable emulsions of acrylic esters and allylamines by heating the stirred emulsions gave very hard, strong resins which after hydrolysis had good acid, amine and thermally regenerable capacities. The thermally regenerable capacity depended very much on the nature of the acrylic ester and the allylamine. The order of increasing thermally regenerable capacity for the resins prepared is methyl acrylate (MA)/triallylamine (TAA), MA/diallylamine (DAA), MA/methyldiallylamine (MDAA) < ethyl acrylate (EA)/TAA, EA/DAA < EA/MDAA, butyl acrylate/MDAA. The dispersion of the unstable emulsions in a third phase resulted in immediate breakdown of the emulsion. The dispersion of partly prepolymerized emulsio...
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