Abstract:

Measurements of the viscosity and density of diethyl carbonate are reported at temperatures from 263 K to 363 K and at pressures up to 20 MPa.The measurements were performed simultaneously by using a vibrating-wire instrument operating in the forced mode of oscillation.The overall uncertainties of these results were ±2.0% in viscosity and ±0.2% in density.The measurements were correlated with the Tait-type equation for density and the Hard-sphere scheme for viscosity.The average absolute deviation and the maximum absolute deviation of the viscosity measurements from the correlation for diethyl carbonate were 0.54% and 1.98%, respectively.With regard to density, the average absolute deviation and the maximum absolute deviation of the present results from the correlation were 0.042% and 0.12%, respectively.Comparisons of the experimental data and measurements from literatures with the values calculated by the correlations at different temperatures and pressures were presented.

Key words:

密度, 碳酸二乙酯, 振动弦, 黏度

摘要：

采用振动弦黏度/密度计对碳酸二乙酯的黏度与密度进行了实验研究，测量的温度范围为263～363 K，压力范围为0.1～20 MPa。实验系统黏度和密度测量的不确定度分别为±2.0%和±0.2%。利用得到的实验数据，分别拟合了碳酸二乙酯黏度和密度方程。黏度实验数据与方程的平均绝对偏差为0.54%，最大绝对偏差为1.98%；密度实验数据与方程的平均绝对偏差为0.042%，最大绝对偏差为0.12%。最后将实验数据与文献数据进行了比较。为碳酸二乙酯作为替代燃料等研究提供了基础数据。

关键词:

密度, 碳酸二乙酯, 振动弦, 黏度