The achieved viscosities were used to calculate the viscosity B coefficient of the mixtures.The results show that the values of V E are negative over the entire composition range. The results indicate that the Redlich-Kister equation can be used to correlate the two mentioned physical properties of this system well.The viscosity B coefficient of the mixtures was calculated by Jones-Dole equation,and its value is 0.35608,which indicates that the methanol effectively reduces the viscosity of ionic liquids.
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