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Density and Viscosity of Glycolic, Lactic, and Malic Acid Esters
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2022-08-19 , DOI: 10.1021/acs.jced.2c00267 Svetlana V. Portnova 1 , Natalia S. Kuzmina 1 , Yulia F. Yamshchikova 1 , Eugene L. Krasnykh 1
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2022-08-19 , DOI: 10.1021/acs.jced.2c00267 Svetlana V. Portnova 1 , Natalia S. Kuzmina 1 , Yulia F. Yamshchikova 1 , Eugene L. Krasnykh 1
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Densities and viscosities were measured as a function of temperature for 12 esters of glycolic, dl-lactic, and dl-malic acids and linear chain alcohols C1–C5. The density and kinematic viscosity were obtained using a pycnometer and a Pinkevitch capillary viscometer in a temperature range of 293.15–363.15 K with accuracies of 0.1 and 0.35%, respectively. The obtained data were used for dynamic viscosity calculation. It was demonstrated that the viscosity–temperature dependence of esters was described by the ASTM D341 model with an average absolute relative deviation of 1%. The temperature dependence of dynamic viscosity was fitted using the Arrhenius-like equation and Vogel–Fulcher–Tammann (VFT) model. It was found that the adjustable parameters A and B have the similar value for compounds in one homologous series. These parameters were taken as constant for each series of esters of the corresponding acids. The dynamic viscosity–temperature dependence of esters was better described by the VFT model than the Arrhenius-like equation. The capabilities of some group-additivity methods for predicting density have been reviewed and compared with experimental results.
中文翻译：
乙醇酸酯、乳酸和苹果酸酯的密度和粘度
测量 12 种乙醇酸、 dl-乳酸和dl-苹果酸的酯和直链醇 C 1 –C 5的密度和粘度随温度的变化. 使用比重瓶和 Pinkevitch 毛细管粘度计在 293.15–363.15 K 的温度范围内获得密度和运动粘度，精度分别为 0.1 和 0.35%。获得的数据用于动态粘度计算。结果表明，酯的粘度-温度依赖性由 ASTM D341 模型描述，平均绝对相对偏差为 1%。动态粘度的温度依赖性使用类似 Arrhenius 的方程和 Vogel-Fulcher-Tammann (VFT) 模型进行拟合。发现可调参数A和B对于同源系列中的化合物具有相似的值。对于相应酸的每个系列的酯，这些参数被视为常数。VFT 模型比 Arrhenius 类方程更好地描述了酯的动态粘度 - 温度依赖性。已经回顾了一些预测密度的群可加性方法的能力，并与实验结果进行了比较。
更新日期：2022-08-19
中文翻译：
乙醇酸酯、乳酸和苹果酸酯的密度和粘度
测量 12 种乙醇酸、 dl-乳酸和dl-苹果酸的酯和直链醇 C 1 –C 5的密度和粘度随温度的变化. 使用比重瓶和 Pinkevitch 毛细管粘度计在 293.15–363.15 K 的温度范围内获得密度和运动粘度，精度分别为 0.1 和 0.35%。获得的数据用于动态粘度计算。结果表明，酯的粘度-温度依赖性由 ASTM D341 模型描述，平均绝对相对偏差为 1%。动态粘度的温度依赖性使用类似 Arrhenius 的方程和 Vogel-Fulcher-Tammann (VFT) 模型进行拟合。发现可调参数A和B对于同源系列中的化合物具有相似的值。对于相应酸的每个系列的酯，这些参数被视为常数。VFT 模型比 Arrhenius 类方程更好地描述了酯的动态粘度 - 温度依赖性。已经回顾了一些预测密度的群可加性方法的能力，并与实验结果进行了比较。
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