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Interaction between weak neutralized polyelectrolyte complex polyacrylamide/poly(4-vinylpyridine) and sodium dodecylsulfate in saline medium | Abstract

Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry

ISSN: 0975-413X
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Abstract

Interaction between weak neutralized polyelectrolyte complex polyacrylamide/poly(4-vinylpyridine) and sodium dodecylsulfate in saline medium

Author(s): L. Tennouga, K. Medjahed, A. Mansri, B. Bouras, B. Grassl

The rheological behaviors of aqueous solutions of polyelectrolyte complex 27% hydrolyzed polyacrylamide [AD37]/ poly(4-vinylpyridine) [P4VP] and charged surfactant, sodium dodecylsulfate (SDS), at neutralization degree α=0.1, are reported. Viscosity variations of this system show a shear thinning behaviour for the strong shear rate. For low concentrations in P4VP, and at low shear rate, the fluid presents a Newtonian behaviour and tends to disappears when the concentration in P4VP increases (4.10-4 g/ml). The interaction of complex (AD37-P4VP) is favoured in the presence of the SDS where the electrostatic repulsions are dominant.Obtained results demonstrate that surfactant–complex polyelectrolyte interaction is governed by both electrostatic and hydrophobic interactions, and is cooperative in the presence of salt.


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