Mixtures of n-dodecane with C₁₀H₁₄ aromatic isomers (iso-butylbenzene, sec-butylbenzene, tert-butylbenzene, and 1,3-diethylbenzene) were analyzed for density, viscosity, speed of sound, surface tension, and flash point. As the concentration of the aromatic component increased, densities, bulk moduli, and surface tensions increased, and viscosities and flash points decreased. Concentration increases caused the speed of sound of 1,3-diethylbenzene to increase monotonically, but for the other compounds, the speed of sound initially decreased before increasing to their maximum value. Excess molar volumes, V_m^E, and excess isentropic compressibilities were positive, and excess speeds of sound, c^E, were negative, indicating non-ideal behavior. Viscosity deviations were negative for all mixtures, and excess molar Gibbs energies of activation for viscous flow did not differ statistically from zero. Mixtures of 1,3-diethylbenzene deviated from ideal mixture behavior the least, and tert-butylbenzene deviated from ideal mixture behavior the most. These mixtures alone would not be good surrogate mixtures for diesel and jet fuel because no mole fraction matched both viscosity and density. The addition of other compounds could remedy this problem.

中文翻译：

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正十二烷与各种十碳芳烃化合物（2-甲基-1-苯基丙烷，2-甲基-2-苯基丙烷，2-苯基丁烷和1,3-二乙苯）的二元混合物的物理性质：密度，粘度，速度T =（293.15–333.15）K和0.1 MPa时的声音，体积模量，表面张力和闪点的变化

分析了正十二烷与C ₁₀ H ₁₄芳族异构体（异丁基苯，仲丁基苯，叔丁基苯和1,3-二乙苯）的混合物的密度，粘度，声速，表面张力和闪点。随着芳族组分浓度的增加，密度，体积模量和表面张力增加，粘度和闪点降低。浓度的增加导致1,3-二乙苯的声速单调增加，但是对于其他化合物，声速在增加至最大值之前先降低。过量的摩尔体积，V _m ^E，而等熵的可压缩性为正，而声速c ^E的为负，表明存在不理想的行为。对于所有混合物，粘度偏差均为负，并且粘性流动的过量摩尔吉布斯活化能在统计学上与零没有差异。1,3-二乙苯的混合物偏离理想混合物行为最少，而叔丁基苯的偏离最大混合物行为最多。仅这些混合物就不能成为柴油和喷气燃料的良好替代混合物，因为没有摩尔分数与粘度和密度相匹配。添加其他化合物可以解决此问题。