The modification of polyvinyl chloride (PVC) with polyvinylamine (PVAm) via nucleophilic substitution was systematically optimized to obtain an efficient anion-exchange resin. The most effective structural transformation was achieved at a PVC:PVAm molar ratio of 1:1.25, at which the substitution of chlorine atoms by amino groups was maximized. Under these conditions, the degree of modification reached approximately 83.5%, indicating substantial incorporation of functional amine groups into the polymer backbone. Furthermore, the modified resin exhibited a high static exchange capacity (SEC) of 2.97 meq g⁻¹, confirming its excellent ion-exchange performance. These results demonstrate that the synthesized material is a promising candidate for applications in water purification and ion-separation processes requiring high anion-exchange efficiency. The nucleophilic substitution pathway ensures effective functionalization while maintaining chemical stability and practical applicability.
Notes:Abstract: The modification of polyvinyl chloride (PVC) with polyvinylamine (PVAm) via nucleophilic substitution was systematically optimized to obtain an efficient anion-exchange resin. The most effective structural transformation was achieved at a PVC:PVAm molar ratio of 1:1.25, at which the substitution of chlorine atoms by amino groups was maximized. Under these conditions, the degree of modification reached approximately 83.5%, indicating substantial incorporation of functional amine groups into the polymer backbone. Furthermore, the modified resin exhibited a high static exchange capacity (SEC) of 2.97 meq g⁻¹, confirming its excellent ion-exchange performance. These results demonstrate that the synthesized material is a promising candidate for applications in water purification and ion-separation processes requiring high anion-exchange efficiency. The nucleophilic substitution pathway ensures effective functionalization while maintaining chemical stability and practical applicability.