Summary
Poly(vinyl chloride) has been modified chemically to a cation exchange resin by halogen displacement reactions with phenol sulfonic acid, bisphenol-A sulfonic acid and phenolpthalein sulfonic acid. Ion-exchange capacity, salt-splitting capacity and pH-titration characteristics of these resins have been evaluated. pH-titration behaviour of these resins is consistent with that of a polyfunctional cation-exchanger having pK1=2 and pK2=9–10 corresponding to -SO3H and phenolic-OH groups respectively. The ion-exchange capacity values are comparable in magnitude to those of polystyrene based commercial cation-exchangers such as Amberlite IR-120 and Dowex-50.
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Moitra, S., Biswas, M. Cation exchange resins from chemically modified poly(vinyl chloride). Polymer Bulletin 17, 361–368 (1987). https://doi.org/10.1007/BF00955721
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DOI: https://doi.org/10.1007/BF00955721