反气相色谱法对八异辛基倍半硅氧烷热力学性质的表征  

Investigation of Thermodynamic Properties of Octaisooctyl-POSS by Inverse Gas Chromatography

作　　者：邹其超[1] 余欢[2] 陈浩[2] 

机构地区：[1]湖北大学化学化工学院,湖北武汉430062 [2]湖北大学材料科学与工程学院,湖北武汉430062

出　　处：《分析测试学报》2009年第10期1127-1132,共6页Journal of Instrumental Analysis

基　　金：湖北省教育厅科学技术研究项目(D200710003)

摘　　要：采用反气相色谱技术,以23种溶剂为探针分子,表征了八异辛基倍半硅氧烷（octaisooctyl-POSS）的热力学性质,包括摩尔溶解焓、分子间相互作用参数、质量活度系数、Hansen溶度参数,并有效判断了溶剂探针分子与共聚物分子间的相互作用以及共聚物在这些溶剂中的溶解性。结果表明,在实验温度范围内（343-393 K）,烷烃、芳香烃、卤代烃类、乙醚以及乙酸甲酯是octaisooctyl-POSS的良溶剂,乙酸乙酯、乙酸正丙酯、乙酸正丁酯与乙酸正戊酯是中等溶剂,醇类、丙酮以及四氢呋喃是不良溶剂;Hansen溶度参数表明,octaisooctyl-POSS与烷烃分子强烈的色散作用使其在烷烃溶剂中具有优良的溶解性能。The thermodynamic properties of octaisooctyl- polyhedral oligomeric silsesquioxane（octaisooctyl -POSS） were investigated by means of inverse gas chromatography （IGC） using 23 different kinds of solvents as the probes for the first time. Some important thermodynamic parameters, such as molar heats of sorption, Flory - Huggins interaction parameter, weight fraction activity coefficient, partial molar heats of mixing and Hansen solubility parameter could be obtained via IGC method to judge the interactions between octaisooctyl - POSS and solvents, as well as the solubility of octaisooctyl- POSS in these solvents. It was found that alkanes, aromatic hydrocarbons, hydrocarbon halides, methyl acetate and diethylether were good solvents, ethyl acetate, n-propyl acetate, n-butyl acetate, n-pentyl acetate were moderate solvents, while alcohols, tetrahydrofuran and acetone were bad solvents for octaisooctyl-POSS in the experimental temperature range. According to Hansen＇s solubility parameters, the solubility of octaisooctyl - POSS in alkanes solvents were better in other solvents attributing to stronger dispersive interaction between octaisooctyl -POSS and alkane probes.

关 键 词：八异辛基倍半硅氧烷 热力学参数 反气相色谱 

分 类 号：O657.71[理学—分析化学]