Abstract Dynamic viscosity (η) and density (ρ) were simultaneously measured for pure 2-alcohols (2-propanol, 2-butanol, 2-pentanol, 2-hexanol, and 2-heptanol) in the temperature range from (291–349) K and pressures up to 50 MPa. The measurements were performed using a new coil capillary viscometer coupled with a vibrating tube densimeter with a relative expanded uncertainty (coverage factor k = 2 ) of 1.6% for the dynamic viscosity and 0.3% for the density considering the impurities of the compounds. The reliability of the equipment used was verified by determining and comparing the dynamic viscosity and density of ethanol with the data published in the international literature, resulting a maximum deviation of 10 μPa s for viscosity and 0.40 kg m−3 for density. Experimental dynamic viscosity and density data were successfully represented by two empirical models, obtaining good results in agreement with the uncertainty (maximum deviation of 1.3% and 0.15% for dynamic viscosity and density, respectively). From the experimental density data, the isothermal compressibility and isobaric thermal expansivity were determined.

中文翻译：

---

在 (291 和 353) K 之间的温度和高达 50 MPa 的压力下同时测量粘度和密度并模拟 2-醇

摘要 在 (291–349) 的温度范围内同时测量纯 2-醇（2-丙醇、2-丁醇、2-戊醇、2-己醇和 2-庚醇）的动态粘度 (η) 和密度 (ρ) ) K 和高达 50 MPa 的压力。使用新的线圈毛细管粘度计和振动管密度计进行测量，动态粘度的相对扩展不确定度（覆盖系数 k = 2）为 1.6%，密度为 0.3%，考虑到化合物的杂质。通过测定乙醇的动态粘度和密度并将其与国际文献中公布的数据进行比较，验证了所用设备的可靠性，结果粘度最大偏差为10 μPa s，密度偏差为0.40 kg m-3。实验动态粘度和密度数据成功地由两个经验模型表示，获得了与不确定性一致的良好结果（动态粘度和密度的最大偏差分别为 1.3% 和 0.15%）。根据实验密度数据，确定了等温压缩率和等压热膨胀率。