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Properties of Binary Mixtures of 2,2,4,6,6-Pentamethylheptane (iso-Dodecane) with iso-Butylbenzene, sec-Butylbenzene, tert-Butylbenzene, or 1,3-Diethylbenzene: Densities, Viscosities, Speeds of Sound, and Isentropic Bulk Moduli in the Temperature Range of 288.15–333.15 K, Surface Tensions at 295 K, and Flash Points at 0.1 MPa
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-08-24 , DOI: 10.1021/acs.jced.0c00581 Dianne Luning Prak 1 , Jim S. Cowart 2
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-08-24 , DOI: 10.1021/acs.jced.0c00581 Dianne Luning Prak 1 , Jim S. Cowart 2
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This work reports on the experimentally measured densities, viscosities, speeds of sound, surface tensions, and flash points, and calculated bulk moduli of mixtures of 2,2,4,6,6-pentamethylheptane (iso-dodecane) with iso-butylbenzene, sec-butylbenzene, tert-butylbenzene, or 1,3-diethylbenzene. As the mole fraction of the aromatic component increased, the viscosities decreased and the densities, speeds of sound, bulk moduli, surface tensions, and flash points increased, except for mixtures with tert-butylbenzene, where the flash point did not vary because both components had the same flash point. The excess molar Gibbs energies of activation for viscous flow were slightly negative (but not statistically different from zero), and the viscosity deviations were negative at 293.15 K. At higher temperatures, the viscosity deviations were closer to zero. Excess molar volumes VmE for these nonpolar mixtures were positive for iso-butylbenzene, sec-butylbenzene, and tert-butylbenzene and negative for 1,3-diethylbenzene, suggesting that the more bulky branched substituents on the aromatic packed less well with the iso-dodecane than did the disubstituted linear substituents. The values of VmE did not vary over the temperature range measured. For all mixtures, excess speeds of sound were positive and excess isentropic compressibilities were negative at 298.15 K. Knowing the impact of various isomers on the physical properties of mixtures can enable researchers to select the best compound for use in their design of surrogate fuel mixtures.
中文翻译：
2,2,4,6,6-五甲基庚烷（异十二烷）与异丁苯，仲丁苯，叔丁苯或1,3-二乙苯的二元混合物性质：密度，粘度，声速和在288.15–333.15 K的温度范围内的等熵块模量，295 K的表面张力和0.1 MPa的闪点
这项工作报告了实验测量的密度，粘度，声速，表面张力和闪点，并计算了2,2,4,6,6-五甲基庚烷（异十二烷）与异丁苯的混合物的体积模量，仲丁基苯，叔丁基苯或1,3-二乙基苯。作为芳族组分的摩尔分数增加，粘度下降和密度，声音，体积弹性模量，表面张力，和闪点的速度的提高，不同的是用混合叔-丁基苯，其闪点没有变化，因为两种组分的闪点相同。粘性流动的过量摩尔Gibbs活化能稍为负（但在统计上不为零），粘度偏差在293.15 K时为负。在较高温度下，粘度偏差接近于零。这些非极性混合物的过量摩尔体积V m E对异丁苯，仲丁苯和叔丁苯为正，对1,3-二乙苯为负，表明芳族化合物上较大的支链取代基与异丁烯的填充较少-十二烷比二取代的线性取代基大。V m E的值在测量的温度范围内没有变化。对于所有混合物，在298.15 K处，声音的过快速度为正，而等熵压缩率则为负。了解各种异构体对混合物物理性质的影响，可以使研究人员选择最佳的化合物用于替代燃料混合物的设计。
更新日期：2020-09-10
中文翻译：
2,2,4,6,6-五甲基庚烷（异十二烷）与异丁苯，仲丁苯，叔丁苯或1,3-二乙苯的二元混合物性质：密度，粘度，声速和在288.15–333.15 K的温度范围内的等熵块模量，295 K的表面张力和0.1 MPa的闪点
这项工作报告了实验测量的密度，粘度，声速，表面张力和闪点，并计算了2,2,4,6,6-五甲基庚烷（异十二烷）与异丁苯的混合物的体积模量，仲丁基苯，叔丁基苯或1,3-二乙基苯。作为芳族组分的摩尔分数增加，粘度下降和密度，声音，体积弹性模量，表面张力，和闪点的速度的提高，不同的是用混合叔-丁基苯，其闪点没有变化，因为两种组分的闪点相同。粘性流动的过量摩尔Gibbs活化能稍为负（但在统计上不为零），粘度偏差在293.15 K时为负。在较高温度下，粘度偏差接近于零。这些非极性混合物的过量摩尔体积V m E对异丁苯，仲丁苯和叔丁苯为正，对1,3-二乙苯为负，表明芳族化合物上较大的支链取代基与异丁烯的填充较少-十二烷比二取代的线性取代基大。V m E的值在测量的温度范围内没有变化。对于所有混合物，在298.15 K处，声音的过快速度为正，而等熵压缩率则为负。了解各种异构体对混合物物理性质的影响，可以使研究人员选择最佳的化合物用于替代燃料混合物的设计。
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