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Self-consistent mode-coupling theory for the viscosity of rodlike polyelectrolyte solutions

Miyazaki, Kunimasa and Bagchi, Biman and Yethiraj, Arun (2004) Self-consistent mode-coupling theory for the viscosity of rodlike polyelectrolyte solutions. In: Journal of Chemical Physics, 121 (16). pp. 8120-8127.

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Abstract

A self-consistent mode-coupling theory is presented for the viscosity of solutions of charged rodlike polymers. The static structure factor used in the theory is obtained from polymer integral equation theory; the Debye-Hückel approximation is inadequate even at low concentrations. The theory predicts a nonmonotonic dependence of the reduced excess viscosity \eta R on concentration from the behavior of the static structure factor in polyelectrolyte solutions. The theory predicts that the peak in \eta R occurs at concentrations slightly lower than the overlap threshold concentration, c*. The peak height increases dramatically with increasing molecular weight and decreases with increased concentrations of added salt. The position of the peak, as a function of concentration divided by c*, is independent of salt concentration or molecular weight. The predictions can be tested experimentally.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to American Institute of Physics (AIP).
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 10 Jan 2005
Last Modified: 19 Sep 2010 04:17
URI: http://eprints.iisc.ernet.in/id/eprint/2549

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