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On the possibility of estimating weak interactions of macromolecules in solutions from the experimental viscous flow activation energies data

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Summary

The initial viscosity and activation energy in viscous flow of the systems: water(W)-casein(C)-polysaccharide(PS) (gum arabic(G),de-xtran(D), extran sulfat (DS)) have been determined for various ionic strengths corresponding to total or limited thermodynamic compatibility of macrocomponents. Excess activation energy ΔH Eη due to the protein-polysaccharide interactions has been calculated. It is positive for systems with total compatibility and negative for systems with limited compatibility. Moreover, it yields information on type of the protein-polysaccharide interactions. Negative ΔH Eη means that repulsive forces are dominant, while positive ΔH Eη means that attractive forces are dominant. Since the properties of the systems W-C-D and W-C-DS are similar, it is believed that C-D complexes can possibly be formed with an energy ∼ 2 kT(10 mJ/g).

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Authors and Affiliations

  1. Institute of Organoelement Compounds, USSR Academy of Sciences, Vavilov St. 28, B-312, Moscow, USSR

    E. P. Varfolomeeva, V. Ya. Grinberg & V. B. Tolstogusov

Authors
  1. E. P. Varfolomeeva
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  2. V. Ya. Grinberg
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  3. V. B. Tolstogusov
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Additional information

The authors express their sincere graditude to Konstantinov A.A., Kondratev V.P., Chernysh M.M. (Special Design Bureau of the Institute of Petroleum Chemical Synthesis, The USSR Academy of Sciences) and Dmitrienko A.P. (Institute of Organoelement compounds, The USSR Academy of Sciences) for their invaluable help.

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Varfolomeeva, E.P., Grinberg, V.Y. & Tolstogusov, V.B. On the possibility of estimating weak interactions of macromolecules in solutions from the experimental viscous flow activation energies data. Polymer Bulletin 2, 613–618 (1980). https://doi.org/10.1007/BF00263032

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  • DOI: https://doi.org/10.1007/BF00263032

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