文献类型：期刊文献

英文题名：Critical behaviour of binary mixture of {xC₆H₅CN + (1-x)CH₃(CH₂)₇CH₃}: Measurements of coexistence curves, light scattering, and heat capacity

作者：Lei, Yuntao[1];Chen, Zhiyun[2];Wang, Nong[1,2];Mao, Chunfeng[1];An, Xueqin[2,3];Shen, Weiguo[1,2]

机构：[1]Lanzhou Univ, Dept Chem, Lanzhou 730000, Gansu, Peoples R China;[2]E China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]Nanjing Normal Univ, Jiangsu Key Lab Biofunct Mat, Nanjing 210097, Peoples R China

年份：2010

卷号：42

期号：7

起止页码：864

外文期刊名：JOURNAL OF CHEMICAL THERMODYNAMICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000278392800008)】；

基金：This work was supported by the National Natural Science Foundation of China (Projects 20473035, 20603014, 20673059, and 20973061), the Chinese Ministry of Education (Key project 105074) and Committee of Science and Technology of Shanghai (Projects 0652nm010 and 08jc1408100).

语种：英文

外文关键词：Critical phenomena; Coexistence curve; Light scattering; Heat capacity; Crossover phenomena; Benzonitrile

摘要：Liquid + liquid coexistence, light scattering, and isobaric heat capacity per unit volume for the critical solutions of (benzonitrile + n-nonane) have been measured. The critical exponents relating to the coexistence curve beta, the osmotic compressibility gamma, the correlation length nu, and the heat capacity alpha have been deduced and the values are consistent with the 3D-Ising values in the range close to the critical point. The experimental results of the liquid + liquid coexistence were analyzed to examine the Wegner correction terms and the behaviour of the diameter of the coexistence curves. The light scattering data were well described by the crossover model proposed by Anisimov and Sengers, and showed a tendency of monotonic crossover of the critical exponents gamma and nu from the 3D-Ising values to the mean-field values as the temperature departures from the critical point. From calorimetric measurements, the amplitude A(+/-) and the critical background B-cr of the heat capacity in the critical region have been deduced and some universal ratios are tested. (c) 2010 Elsevier Ltd. All rights reserved.