Scaling of Shear Viscosity of Nitro‐benzene/Isooctane Mixtures in the Critical Region

Results of measurements of the temperature dependence of shear viscosity of seven nitro‐benzene/isooctane mixtures of different compositions in the critical region are reported. The analysis of the viscosity data of the mixture of the critical composition in terms of critical exponent gives a value of φ η = 0.048 ± 0.001. It is higher by about 20% than the theoretical value based on dynamic renormalization group theory calculations. The shear viscosity data of the non‐critical mixtures are in agreement with the scaling concepts of critical phenomena.