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Ultrasonic studies of the binary mixtures of ethyl acetate and cresols-application of Kosower and Dimroth treatments

机译:乙酸乙酯和甲酚二元混合物的超声研究-Kosower和Dimroth处理的应用

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The ultrasonic velocity (nu) studies were carried out at a frequency of 2 MHz (transducer of x-cut quartz crystal) using ultrasonic pulse echo system (model UX4400-M) on cresols in ethyl acetate at constant temperature of 311 K. The values of internal pressure (pi(i)) and molar free volume (V-f) were calculated from measured values of ultrasonic velocity (nu), viscosity (eta) and density (rho). An attempt is made to rationalize the ultrasonic velocity (v), internal pressure (pi(i)) and free volume (V-f) of binary mixtures using Kosower solvent parameter (Z), Dimroth solvent parameter (E-T) and Dielectric constant (is an element of). It is found that there is linear correlation between ultrasonic velocity and acidity constant pk(-1)a, indicating the dependence of acidity. Correlation of Ksower and Dimroth parameters with ultrasonic velocity confirms that solvent polarity is an important factor in the variation of ultrasonic velocity in the present investigation. (C) 2004 Published by Elsevier B.V.
机译:使用超声波脉冲回波系统(型号UX4400-M),在311 K的恒定温度下,在乙酸乙酯中的甲酚中,以2 MHz的频率(x切石英晶体的换能器)进行超声速度(nu)研究。由超声速度(nu),粘度(η)和密度(rho)的测量值计算出内部压力(pi(i))和摩尔自由体积(Vf)的平均值。尝试使用Kosower溶剂参数(Z),Dimroth溶剂参数(ET)和介电常数(是一个常数)合理化二元混合物的超声速度(v),内压(pi(i))和自由体积(Vf)。的元素)。发现超声速度与酸度常数pk(-1)a之间存在线性关系,表明酸度的依赖性。 Ksower和Dimroth参数与超声速度的相关性证实,在本研究中,溶剂极性是影响超声速度变化的重要因素。 (C)2004由Elsevier B.V.发布

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