Abstract
The rheological properties (viscosity and dynamic elasticity modulus) of solutions and gels of combined systems composed of hydrophobically modified polymers containing main-chain charged groups or lacking these groups and of newly synthesized viscoelastic cationic surfactants with different amounts of OH groups and long nonpolar saturated and trans monounsaturated radicals have been studied. It has been shown that the maximum viscosity of solutions of polymer-surfactant complexes corresponds to the very low concentration of the surfactant. Regions where homogeneous and heterogeneous combined solutions and gels exist are considered. An increase in the viscosity of the combined solutions with temperature is discovered and discussed. The synergistic effect of polymers and surfactants is demonstrated, and a more efficient role of surfactants in the case of uncharged polymers is revealed. The roles of the number of OH groups and the length of the nonpolar radical in a surfactant molecule and a difference in the properties of systems containing surfactants with saturated and unsaturated radicals are considered.
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Original Russian Text © L.Z. Rogovina, V.G. Vasil’ev, V.N. Matveenko, N.A. Churochkina, T.A. Pryakhina, A.R. Khokhlov, 2007, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2007, Vol. 49, No. 12, pp. 2173–2181.
This work was supported by the Russian Foundation for Basic Research, project no. 06-03-32127a.
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Rogovina, L.Z., Vasil’ev, V.G., Matveenko, V.N. et al. Rheological properties of solutions and gels of combined systems hydrophobically modified polyacrylamides-new viscoelastic cationic surfactants. Polym. Sci. Ser. A 49, 1358–1365 (2007). https://doi.org/10.1134/S0965545X07120097
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DOI: https://doi.org/10.1134/S0965545X07120097