We have measured the temperature dependence of the flow birefringence in the isotropic phase of p-methoxybenzylidene p-n-butylaniline. We have observed a divergence as the phase transition is approached. We have determined the steady shear viscosity η₀ and the coupling coefficient μ between velocity shear and the order parameter as a function of temperature. We have also measured the real part of the shear impedance and compared the results with light-scattering data. Our results are well described by de Gennes's theory.
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Martinoty et al. (1971) studied this question.
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