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Rheological Analysis of Chemical Fiber Spinning

  • CHEMISTRY AND TECHNOLOGY OF CHEMICAL FIBERS
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Fibre Chemistry Aims and scope

Rheological studies of wet-spinning of fibers were carried out. A solution (18%) of acrylonitrile (60%) and vinylchloride (40%, SKhN-60) in DMF was used. The main rheological characteristics of fiber-jet tension were the apparent longitudinal viscosity and the fiber structuring time; the shear characteristics, the complex (Newtonian) viscosity and equilibrium relaxation time. An attempt was made to relate these rheological tensile and shear characteristics to each other. Two methods were used to calculate the longitudinal viscosity. The first used the segment structuring time (length) to calculate the tensile strains and; correspondingly, the longitudinal viscosity. The apparent viscosity was λa = 1.2.105 Pa.s for a spinning solution Newtonian viscosity of 5.15 Pa.s and spinneret extrusion of unity. This was approximately equal to values for spinning solutions that were obtained by other researchers. The second method was used for the first time to determine the longitudinal viscosity. The equilibrium relaxation time was used to calculate tensile strains and; correspondingly, the longitudinal viscosity. The obtained longitudinal viscosity was called the equilibrium value (6.81 Pa.s). Equations determining the length of the structured fiber-jet segment were obtained theoretically and validated in practice.

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Authors and Affiliations

  1. Scientific-Research Institute of Synthetic Fibers, Tver, Russia

    Yu. A. Vinogradov

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  1. Yu. A. Vinogradov
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Correspondence to Yu. A. Vinogradov.

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Translated from Khimicheskie Volokna, No. 2, pp. 3-11, March—April, 2016.

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Vinogradov, Y.A. Rheological Analysis of Chemical Fiber Spinning. Fibre Chem 48, 95–103 (2016). https://doi.org/10.1007/s10692-016-9749-7

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