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Determination of the rotational viscosity of nematic liquid crystals over an extended range

Florian Bock, H. Kneppe, F. Schneider

Abstract

A method for measuring rotational viscosities of nematic liquid crystals is described. Rotational viscosities from 10−3 to 106Pas can be determined if this method is combined with the usual rotating field method using the same device. Furthermore, non-newtonian behaviour can be detected by the new method.

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Key concepts: Liquid crystal, Rotational viscosity, Materials science, Viscosity, Newtonian fluid, Range (aeronautics), Biaxial nematic, Condensed matter physics