中文摘要：

采用振动弦黏度／密度计对碳酸二甲酯的黏度与密度进行了实验研究，测量的温度范围为283-353K，压力范围为0．1—20MPa。实验系统黏度和密度测量的不确定度分别为±2％和±0．2％。利用得到的实验数据，分别拟合了碳酸二甲酯黏度和密度的关联方程。黏度实验数据与方程的平均绝对偏差为0．47％，最大绝对偏差为2．06％；密度实验数据与方程的平均绝对偏差为0．04％，最大绝对偏差为0．14％。最后将实验数据与文献数据进行了比较。为碳酸二甲酯作为替代燃料等研究提供了基础数据。

英文摘要：

Measurements of the viscosity and density of dimethyl carbonate are reported at temperatures from 283 to 353 K and at pressures up to 20 MPa. The measurements were performed simultaneously using a vibrating-wire instrument operated in the forced mode of oscillation. The overall uncertainties of these results are ±2.0% in viscosity and ±0.2% in density. The measurements were correlated with Tait-type equation for density and Hard-sphere scheme for viscosity. The average absolute deviation and the maximum absolute deviation of the viscosity measurements from the correlation for dimethyl carbonate are 0.47% and 2.06%, respectively. With regard to density, the average absolute deviation and the maximum absolute deviation of the present results from the correlation are 0.04% and 0.14%, respectively. Comparisons of the experimental data and measurements from literatures with the values calculated by the correlations at different temperatures and pressures are presented.