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Thermal sensitivity of poly(N-vinylpyrrolidone) solutions in water-saline media

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Abstract

The effect of salts on the behavior of aqueous solutions of poly(N-vinylpyrrolidone), which is known to show no thermal sensitivity in the absence of additives, has been studied. The introduction of some salts, for example, KF, KH2PO4, K2CO3, and Na2SO4, leads to the occurrence of phase transitions. The corresponding phase transition temperatures depend on the nature and concentration of salts. Even moderate concentrations (0.3–0.6 mol/l) of the most active salts (K2CO3 and Na2SO4) are shown to reduce the phase transition temperature to 10–20°C.

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Authors and Affiliations

  1. State Scientific Center of the Russian Federation, Karpov Institute of Physical Chemistry, ul. Vorontsovo pole 10, Moscow, 105064, Russia

    B. I. Nakhmanovich, N. I. Pakuro, E. I. Akhmet’eva, G. I. Litvinenko & A. A. Arest-Yakubovich

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  1. B. I. Nakhmanovich
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  2. N. I. Pakuro
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  3. E. I. Akhmet’eva
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  4. G. I. Litvinenko
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  5. A. A. Arest-Yakubovich
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Original Russian Text © B.I. Nakhmanovich, N.I. Pakuro, E.I. Akhmet’eva, G.I. Litvinenko, A.A. Arest-Yakubovich, 2007, published in Vysokomolekulyarnye Soedineniya, Ser. B, 2007, Vol. 49, No. 5, pp. 941–944.

This work was supported by the Russian Foundation for Basic Research, project no. 06-03-32505.

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Nakhmanovich, B.I., Pakuro, N.I., Akhmet’eva, E.I. et al. Thermal sensitivity of poly(N-vinylpyrrolidone) solutions in water-saline media. Polym. Sci. Ser. B 49, 136–138 (2007). https://doi.org/10.1134/S1560090407050077

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  • DOI: https://doi.org/10.1134/S1560090407050077

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