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5.3 Binary systems without and with one additional noncritical relaxation term

Figure 5.5: Shear viscosity ηs of the (NE-CH) mixture of critical composition versus absolute temperature: The full curve and the dashed line are graphs of the shear viscosity and the background contribution of the viscosity, respectively. In the inset, the shear viscosity data of the (NE-3MP) system (•) are given along with those of the (NE-CH) mixture of critical composition (▲).

This effective shear rate has an influence on the critical temperature Tc. With S as a cor- rection parameter, the critical temperature has to be written as:

where in the equation (+) refers to an upper critical point (systems in Table (5.2)) and (−) to a lower critical point (systems in Table (5.3)). Independent on the magnitude of shear rate dependence, the

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