Shear and rotational viscosity coefficients of two nematic liquid crystals
- 20 October 1992
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 77 (3) , 521-538
- https://doi.org/10.1080/00268979200102591
Abstract
A new method for the measurement of the shear viscosity coefficients η1, η2, and η3 of nematic liquid crystals is described. A detailed discussion of all sources of errors shows that reliable data can be obtained with this method. Measurements of the shear and rotational viscosity coefficients of a broad range nematic liquid crystal mixture of azoxy benzenes and for octyloxycyanobiphenyl with a transition to a smectic A phase are presented. The results are discussed in the framework of some theories.Keywords
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