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Viscosity of polyacrylonitrile solutions: The effect of the molecular weight

  • Rheology
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Abstract

The copolymer of acrylonitrile with methyl acrylate and itaconic acid (93: 5.7: 1.3) is synthesized via free-radical copolymerization. For solutions of the initial copolymer and its 12 fractions in dimethyl sulfoxide, viscosities are measured in a wide shear-stress range. The viscosity behavior of 10% solutions is examined in more detail, and the rheological studies of several fractions are performed in the concentration interval from 5 to 20%. All solutions exhibit weak non-Newtonian behavior. This makes it possible to determine the zero-shear viscosity. The dependences of this viscosity on the number-average and weight-average molecular masses for the equiconcentrated solutions obey an exponential law with the same exponent, equal to 2.3. The macromolecules of copolymers are inclined toward association. For low-molecular-mass fractions, this effect is the most pronounced.

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Authors and Affiliations

  1. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninskii pr. 29, Moscow, 119991, Russia

    S. O. Ilyin, Yu. V. Kostina, V. G. Kulichikhin & A. Ya. Malkin

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

    E. V. Chernikova

Authors
  1. S. O. Ilyin
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  2. E. V. Chernikova
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  3. Yu. V. Kostina
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  4. V. G. Kulichikhin
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  5. A. Ya. Malkin
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Correspondence to S. O. Ilyin.

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Original Russian Text © S.O. Ilyin, E.V. Chernikova, Yu.V. Kostina, V.G. Kulichikhin, A.Ya. Malkin, 2015, published in Vysokomolekulyarnye Soedineniya. Ser. A, 2015, Vol. 57, No. 4, pp. 373–380.

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Ilyin, S.O., Chernikova, E.V., Kostina, Y.V. et al. Viscosity of polyacrylonitrile solutions: The effect of the molecular weight. Polym. Sci. Ser. A 57, 494–500 (2015). https://doi.org/10.1134/S0965545X15040070

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  • DOI: https://doi.org/10.1134/S0965545X15040070

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