Complexation of oppositely charged polyelectrolytes: effect of ion pair formation
arXiv:cond-mat/0407527 · doi:10.1021/ma048519t
Abstract
Complexation in symmetric solutions of oppositely charged polyelectrolytes is studied theoretically. We include polyion crosslinking due to formation of thermoreversible ionic pairs. The electrostatic free energy is calculated within the Random Phase Approximation taking into account the structure of thermoreversible polyion clusters. The degree of ion association is obtained self-consistently from a modified law of mass action, which includes long-range electrostatic contributions. We analyze the relative importance of the three complexation driving forces: long-range electrostatics, ion association and van der Waals attraction. The conditions on the parameters of the system that ensure stability of the complex with addition of salt are determined.
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- Field-Theoretic Simulations of Polyelectrolyte Complexation
- Self-assembly of spherical interpolyelectrolyte complexes from oppositely charged polymers
- On the nature of screening in Voorn-Overbeek type theories
- Field theory description of ion association in re-entrant phase separation of polyampholytes
- Polymer Complexation: Partially Ionizable Asymmetric Polyelectrolytes