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Phase separation in a poly(acrylic acid)-polycation system in acidic solutions

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Abstract

Phase separation in aqueous solutions of mixtures of poly(acrylic acid) with polycations [poly(diallyldimethylammonium chloride), poly(1,2-dimethyl-5-vinylpyridinium methylsulfate)] in the presence of decimolar hydrochloric acid has been studied by static and dynamic light scattering. The systems are characterized by the upper critical solution temperature. The temperature-dependent association of macromolecules is observed in the single-phase region. A decrease in temperature leads to phase separation; the composition of the diluted phase is determined by the temperature and composition of the initial mixture; and the composition of the concentrated phase remains almost invariable. The occurrence of association in the mixtures is probably the formation of interpolymer complex due to ion-dipole interactions between the carboxyl groups of poly(acrylic acid) and the functional groups of the polycation.

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Authors and Affiliations

  1. Faculty of Chemistry, Moscow State University, Moscow, 119991, Russia

    E. A. Litmanovich, S. O. Zakharchenko, G. V. Stoychev & A. B. Zezin

Authors
  1. E. A. Litmanovich
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  2. S. O. Zakharchenko
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  3. G. V. Stoychev
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  4. A. B. Zezin
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Correspondence to E. A. Litmanovich.

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Original Russian Text © E.A. Litmanovich, S.O. Zakharchenko, G.V. Stoychev, A.B. Zezin, 2009, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2009, Vol. 51, No. 6, pp. 940–945.

This work was supported by the Russian Foundation for Basic Research, project no. 08-03-00445.

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Litmanovich, E.A., Zakharchenko, S.O., Stoychev, G.V. et al. Phase separation in a poly(acrylic acid)-polycation system in acidic solutions. Polym. Sci. Ser. A 51, 616–621 (2009). https://doi.org/10.1134/S0965545X09060054

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