Flexible polyelectrolytes with monovalent salt

Paulo S. Kuhn and Marcia C. Barbosa

Physica A: Statistical Mechanics and its Applications, 2005, vol. 357, issue 1, 142-149

Abstract: We present a model for describing flexible polyelectrolytes in a good solvent and in the presence of monovalent salt. The molecule composed by N monomers is characterized by the end-to-end distance Re=b(Z-1)γ and the number of associated counterions n. At high temperatures the polyelectrolyte behaves as a neutral polymer (γ=0.588). Decreasing the temperature, the macromolecule changes from this extended configuration (γ=0.588) to a stretched form (γ≈1). At even lower temperatures, above the Manning condensation threshold, the polyelectrolyte collapses (γ≈0.3). Our results show good agreement with simulations.

Keywords: Polyelectrolyte; Salt; Collapse transition; Monovalent salt (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:357:y:2005:i:1:p:142-149

DOI: 10.1016/j.physa.2005.05.048

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