This work reports the density, viscosity, and speed of sound of nonane in binary mixtures with n-alkylcyclohexanes (methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl, decyl, and dodecyl) and the derived properties of excess molar volume (V_m^E), excess speed of sound (c^E), excess isentropic compressibility (K_s^E), and viscosity deviation (Δη). The densities, speeds of sound, and viscosities ranged from 686.39 to 825.77 kg·m^–3, from 1065.9 to 1442.3 m·s^–1, and from 0.66 to 9.21 mPa·s, respectively. For most mixtures, the mixture densities, viscosities, and speeds of sound increased with increasing concentration of the component with the higher property value and with decreasing temperature. The K_s^Es and V_m^Es of the nonane mixtures decreased monotonically and the c^Es increased monotonically as the size of the alkylcyclohexane increased. The smallest Δη value was found for n-hexylcyclohexane/nonane mixtures. For most mixture systems, the signs of K_s^E and V_m^E were the same, suggesting that enhanced volumes were more compressible, and reduced volumes were less compressible than the space taken up by the individual components. The excess properties and deviation of the nonane mixtures followed trends that are consistent with those of other linear alkanes mixed with the same alkylcyclohexanes.

中文翻译：

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壬烷和正烷基环己烷的二元混合物：(288.15–333.15) K 温度范围内的密度和声速以及 288.15、293.15、298.15 K 和 0.1 MPa 下的粘度

这项工作报告了壬烷与正烷基环己烷（甲基、乙基、丙基、丁基、戊基、己基、辛基、癸基和十二烷基）二元混合物中的密度、粘度和声速以及过量摩尔体积的衍生性质（ V _m ^E）、超音速（c ^E）、超等熵压缩性（K _s ^E）和粘度偏差（Δη）。密度、声速和粘度范围分别为686.39至825.77 kg·m ^–3、1065.9至1442.3 m·s ^–1和0.66至9.21 mPa·s。对于大多数混合物，混合物密度、粘度和声速随着具有较高特性值的组分浓度的增加和温度的降低而增加。随着烷基环己烷尺寸的增加，壬烷混合物的K s _E ^s和V _m ^{E s 单调减少，} c ^{E s 单调增加。}发现正己基环己烷/壬烷混合物的Δn值最小。对于大多数混合物系统， K _s ^E和V _m ^E的符号相同，表明增大的体积比各个组分所占据的空间更容易压缩，而减小的体积则更难压缩。壬烷混合物的过量性质和偏差遵循与与相同烷基环己烷混合的其他直链烷烃一致的趋势。