Polymer Science Series A

, Volume 49, Issue 6, pp 737–744 | Cite as

Influence of the counterion size on swelling and collapse of polyelectrolyte gel

  • A. S. Bodrova
  • I. I. Potemkin
Theory, Modelling

Abstract

A theory that predicts the effect of the counterion size on the swelling and collapse of a weakly charged polyelectrolyte gel was developed. In addition to excluded-volume interactions between monomer units of the gel, the theory involves the counterion-monomer unit and counterion-counterion interactions in terms of the virial approximation. The character of interactions between different units in the system varies from repulsion to attraction depending on the type of solvent, counterion, and dielectric permittivity of the solvent. For solvents with a low permittivity, the effect of condensation of counterions resulting in the formation of ion pairs is taken into account.

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Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  • A. S. Bodrova
    • 1
  • I. I. Potemkin
    • 1
  1. 1.Faculty of PhysicsMoscow State UniversityLeninskie gory, MoscowRussia

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