Viscosity Measurements for the Nematic Liquid Crystal PAA
- 1 March 1985
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 116 (3-4) , 265-284
- https://doi.org/10.1080/00268948508074578
Abstract
An oscillating plate viscometer was used to measure the viscosities of PAA with the molecular axis oriented by an electromagnet. The experimental apparatus allowed measurement when the magnet was oriented in the three principal directions as well as angles in between. This permitted measurement of four independent viscosity coefficients, including μ1 If the Parodi relation is assumed and a value of the twist viscosity is taken from other measurements, all the coefficients in the Leslie-Ericksen theory are available. The measurements are compared to those of Miesowicz1 and the Orsay Liquid Crystal Group.2Keywords
This publication has 17 references indexed in Scilit:
- Measurements of the Rotational Viscosity Coefficient and the Shear-Alignment Angle in Nematic Liquid CrystalsPhysical Review Letters, 1973
- Determination of twist viscosity coefficient in the nematic mesophasesPhysics Letters A, 1971
- Viscosity Measurements by Quasi Elastic Light Scattering in p-AzoxyanisolMolecular Crystals and Liquid Crystals, 1971
- Stress tensor for a nematic liquid crystalJournal de Physique, 1970
- Interfacial Effects on the Viscosity of a Nematic MesophaseMolecular Crystals, 1969
- Linear Oscillation ViscometerReview of Scientific Instruments, 1969
- Oscillating plate viscometry. Part 1.—Theoretical principlesTransactions of the Faraday Society, 1969
- SOME CONSTITUTIVE EQUATIONS FOR ANISOTROPIC FLUIDSThe Quarterly Journal of Mechanics and Applied Mathematics, 1966
- The Three Coefficients of Viscosity of Anisotropic LiquidsNature, 1946
- Influence of a Magnetic Field on the Viscosity of Para-AzoxyanisolNature, 1935