Effects of weak shear on hyperswollen lyotropic smectic liquid crystals

Journal Article · Fri Sep 01 00:00:00 EDT 1995 · International Journal of Thermophysics

DOI:https://doi.org/10.1007/BF02081278· OSTI ID:123366

Yamamoto, J; Tanaka, H ^[1]

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1. Univ. of Tokyo, Minato-ku (Japan)

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.

• Sponsoring Organization: USDOE
• OSTI ID: 123366
• Report Number(s): CONF-940633-; ISSN 0195-928X; TRN: 95:024305
• Journal Information: International Journal of Thermophysics, Vol. 16, Issue 5; Conference: 12. symposium on thermophysical properties, Boulder, CO (United States), 19-24 Jun 1994; Other Information: PBD: Sep 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
LIQUID CRYSTALS
SHEAR PROPERTIES
VISCOSITY
VISCOSIMETERS
DESIGN
MEASURING METHODS
RHEOLOGY
LIGHT SCATTERING