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Change in the structure of a polymer solution in a longitudinal hydrodynamic field

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Journal of Applied Mechanics and Technical Physics Aims and scope

Abstract

There are two qualitatively different conditions for the stretching of liquid fibers formed by moderately concentrated polymer solutions [1]. If the longitudinal gradient of the drawing rate is rather small the structure of the solution remains unchanged. If this gradient exceeds a certain critical value, some of the solvent is expressed from the solution in and the liquid filament is converted into a slightly swollen fiber. The solvent released settles as droplets on the filament surface. This effect is of very great importance for a number of industrial processes pertaining to the production of filaments and films from polymer solutions. In addition, as was reported in [1], the drawing of a liquid filament, accomapnied by orientational formation of the solid phase, can serve as a most simple imitation of the formation of silk and gossamer filaments in nature.

This paper presents a qualitative theory for this phenomenon, based on investigation of the thermodynamic stability of a polymer solution in a longitudinal hydrodynamic field.

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References

  1. S. Ya. Frenkel, V. G. Baranov, N. G. Bel'nikevich, and Yu. N. Panov, “Orientational mechanism of solid phase formation in polymer solutions subjected to a longitudinal hydrodynamic field,” Vysokomolekul. soedineniya, vol. 6, no. 10, 1964.

  2. P. J. Flory, “Statistical Thermodynamics of Semi-Flexible Chain Molecules,” Proc. Roy. Soc., A, vol. 234, no. 1196, 1956.

  3. M. V. Vol'kenshtein, Configurational Statistics of Polymer Chains [in Russian], Izd. AN SSSR, 1959.

  4. C. Tanford, Physical Chemistry of Macromolecules [Russian translation], Izd. Khimiya, 1965.

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Authors and Affiliations

  1. Moscow

    Yu. A. Buevich

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  1. Yu. A. Buevich
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In conclusion the author thanks S. Ya. Frenkel for kindly providing information about the experiments conducted in his laboratory.

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Buevich, Y.A. Change in the structure of a polymer solution in a longitudinal hydrodynamic field. J Appl Mech Tech Phys 8, 16–20 (1967). https://doi.org/10.1007/BF00914453

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  • DOI: https://doi.org/10.1007/BF00914453

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