对甲氧基苯甲醛与N,N-二甲基甲酰胺密度黏度的测定与关联  

Densities and Viscosities for Binary Mixture of p-Methoxybenzaldehyde and N,N-Dimethyl Formamide

作　　者：许为[1] 杨长生[1] 马沛生[1] 邸志国[1] 

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津300072

出　　处：《化学研究》2007年第2期50-54,共5页Chemical Research

摘　　要：在常压,298.15K^353.15K条件下,采用U形振动管密度计测定了对甲氧基苯甲醛-N,N-二甲基甲酰胺二元物系的密度,采用乌氏黏度计测定其黏度;并由密度和黏度数据分别计算了该二元物系超额摩尔体积VE和混合黏度的变化Δη.在不同的温度和组成下超额摩尔体积和混合黏度的变化都是负值,同时对不同温度下的超额摩尔体积与组成的关系以及混合黏度的变化与组成的关系都按Redlich-Kister方程进行了拟合,计算值与实验值的最大标准偏差小于7%.Densities and viscosities of the binary mixture of p-methoxybenzaldehyde and N, N-dimethyl formamide （DMF） at 298.15 K -353.15 K were determined under atmospheric pressure by using a vibrating U-shaped sample tube densimeter and Ubbelohde suspended-level viscometer. Density values were used in determination of excess molar volumes. Viscosities were used to calculated deviations of viscosity. Excess molar volumes and deviations of viscosity are all negative for the binary mixture of p- methoxybenzaldehyde and N, N-dimethyl formamide （DMF） over the entire composition range from 298.15 K to 353.15 K. Both excess molar volumes and deviations of viscosity were fitted by RedlichKister equation. The maximum standard deviations between calculation and experimental values were both lower than 7 %.

关 键 词：对甲氧基苯甲醛 N N-二甲基甲酰胺 黏度 密度 混合黏度的变化 超额摩尔体积 

分 类 号：TQ013.1[化学工程]