The spinnability of viscoelastic solutions of tetradecyl- and hexadecyl-trimethylammonium salicylates |
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Authors: | T. Imae K. Hashimoto S. Ikeda |
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Affiliation: | (1) Present address: Department of Chemistry, Faculty of Science, Nagoya University, Nagoya, Japan |
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Abstract: | The spinnability was measured for aqueous viscoelastic solutions of tetradecyl- and hexadecyltrimethylammonium salicylates (C14TASal, C16TASal) in the absence and presence of sodium salicylate (NaSal) and sodium bromide (NaBr). The spinnability is classified into two types, D and C. While the intrinsic drawing length in type D is proportional to the drawing velocity, the drawing intrinsic length in type C decreases with the drawing velocity or is independent of it. The spinnability changes from type D to C, as the drawing velocity and the surfactant concentration increase, and the temperature lowers. The effect of salt is different between NaSal and NaBr. It can be assumed that a pseudo-network structure composed of rod-like micelles is formed in viscoelastic and spinnable surfactant solutions. Then, the spinnability depends on the balance between the elasticity and the viscosity in which the structure results. |
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Keywords: | Spinnability viscoelasticsurfactantsolution tetradecyltrimethylammoniumsalicylate hexadecyltrimethylammonium salicylate rodlikemicelle |
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