Intermolecular force range and noncritical shear viscosity of the critical binary mixture of benzene - coconut oil

Author(s): Saja Mohammad Abdo, Issam Rashid Abdelraziq

Shear viscosity coefficients of benzene and coconut oil binarymixture have beenmeasured using digital viscometer. The measured values were taken over the entire concentration range above the critical temperature. The results above the critical temperature were analyzed by the mode coupling theory. The anomaly of shear viscosity was detected as a function of temperature and concentration. The value of noncritical part of shear viscosity near the critical temperature wasmeasured to be  = 1.30cP. The Debye momentumcutoff is found to be 0.358 , the constantA= 0.052 ± 0.003, the correlation length æ’ = 1.02Å, and the intermolecular force range L= 9.90Å by using the mode coupling approach. The forces are weak because of the small value of the viscosity.

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