Abstract
We have developed a Zimm-type viscometer specially designed for the simultaneous measurements of the structure factor and the viscosity of hyperswollen lyotropic liquid crystals under a very weak shear. We have investigated the shear effects on the layer undulation fluctuation in the lamellar structure and the transition from the anisotropic lamellar to the isotropic sponge phase. We have found a significant difference in the rheological properties between the lamellar and the sponge phase: The former exhibits non-Newtonian flow behavior, while the latter exhibits Newtonian behavior.
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Yamamoto, J., Tanaka, H. Effects of weak shear on hyperswollen lyotropic smectic liquid crystals. Int J Thermophys 16, 1099–1107 (1995). https://doi.org/10.1007/BF02081278
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DOI: https://doi.org/10.1007/BF02081278