邻、间、对二甲苯与八甲基环四硅氧烷的过量摩尔体积  

Excess Molar Volumes of o-, m-, p-Xylene with Octamethylcyclotetrasiloxane at 298.15 K

作　　者：欧阳钢锋[1] 陆贵增[1] 潘传荣[1] 杨洋溢[1] 黄钟奇[1] 

机构地区：[1]中山大学化学与化学工程学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2004年第4期47-49,共3页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家973计划资助项目(G2000026302)

摘　　要：在298 15K时用振动管密度计在全浓度范围内测量了邻、间、对二甲苯分别与八甲基环四硅氧烷(D4)组成的3个二元液体混合物的密度,并计算了此3个二元体系的过量摩尔体积VE。3个二元体系的VE均为负值,大小顺序为:间二甲苯>对二甲苯>邻二甲苯。Densities for binary mixtures of octamethylcyclotetrasiloxane with o-xylene, m-xylene,p-xylene respectively were determined at 298.15 K, and their excess molar volumes were derived. It was showed that the excess molar volumes V^E are negative for these three binary systems, and the V^E values are in the order of m-xylene>p-xylene>o-xylene.

关 键 词：过量体积 二甲苯 八甲基环四硅氧烷 

分 类 号：O642.42[理学—物理化学]