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Concentration and Temperature Dependence of Shear Viscosity of the Critical Mixture of Nitroethane and 3-Methylpentane

Journal: 
An-Najah University Journal for Research - Natural Sciences - Volume 16, Issue 2, 2002
Start Page: 
117
End Page: 
124
Received: 
Tuesday, June 13, 2000
Accepted: 
Tuesday, May 7, 2002
Authors: 
Issam R. Abdelraziq
Abstract: 

Shear viscosity coefficients of nitroethane and 3-methylpentane mixture have been measured using digital viscometer. The measured values were over the entire concentration range above the critical temperature (Tc = 299.590 K) in the range 0.040 ? T- Tc ? 18.570 K. The results above the critical temperature Tc were analyzed by the mode coupling theory. The anomaly of shear viscosity was detected as a function of temperature and concentration. A least square fit near the critical temperature yields a value of noncritical part of shear viscosity ?0 = 0.358 cP. The Debye momentum cutoff qD and the constant A in the mode coupling approach were determined. Our values of ?0 and A are in good agreement with the literature values.

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