碳酸二甲酯相关二元体系粘度和密度的测定及关联  

Densities and Viscosities for Correlative System of Dimethyl Carbonate at Different Temperatures

作　　者：李楠楠[1] 马沛生[1] 金会义[1] 杨长生[1] 

机构地区：[1]天津大学化工学院

出　　处：《高校化学工程学报》2004年第6期766-772,共7页Journal of Chemical Engineering of Chinese Universities

基　　金："面向 21 世纪教育振兴行动计划"建设项目;湖北省新型反应器与绿色化学工艺重点实验室基金项目(2003BB01)

摘　　要：在常压下采用U形振动管密度计测定了碳酸二甲酯-甲醇的混合液在293.15～323.15K和碳酸二甲酯-氯苯的混和液在293.15～343.15K下的密度; 用乌氏粘度计测定了这两个混合溶液在相应温度下的粘度,并由密度数据计算出超额体积VE、由粘度数据计算出了不同温度和组成下的混合粘度的变化Δη,前者VE、Δη均为负值.后者VE为正值,Δη基本聚集在0附近. 对不同温度下的超额体积、混合粘度变化与组成的关系按Redlich-Kister方程进行了关联,最大标准偏差小于5%; 说明这两体系适合采用此方程回归.Densities and viscosities of the binary mixture of (dimethyl carbonate + methanol) at the temperatures interval (293.15-323.15 K) and of (dimethyl carbonate + chlorobenzene) at the temperatures interval (293.15-343.15 K) were determined under atmospheric pressure by using a vibrating U-shaped sample tube densimeter and Ubbelohde suspended-level viscometer. Density values gotten were used in the calculation of excess molar volumes and the gotten viscosities were used for the calculation of the viscosity deviations. For (DMC + methanol) system, the excess molar volumes and the deviations of viscosity are all negative and for (DMC + chlorobenzene) system, the excess molar volumes are positive and the deviations of viscosity are in the vicinity of zero. Excess molar volumes and deviations of viscosity were correlated with Redlich-Kister equation respectively. The standard deviations were lower than 5%. The results show these two systems can be regressed by using R-K equation.

关 键 词：碳酸二甲酯 甲醇 氯苯 密度 粘度 超额摩尔体积 

分 类 号：O645.161[理学—物理化学]