N-甲基哌嗪与乙酸乙酯、乙酸丁酯二元混合体系在298.15～313.15K的体积及黏度性质  

Volumetric and Viscous Properties for Binary Mixtures of N-Methylpiperazine with Ethyl Acetate or Butyl Acetate from 298.15 K to 313.15 K

作　　者：李丹[1] 方文军[2] 刘莉[1] 吴倩[1] 张洪艳[1] 孙晓日[1] 

机构地区：[1]潍坊学院化学化工与环境工程学院,潍坊261061 [2]浙江大学化学系,杭州310027

出　　处：《高等学校化学学报》2013年第8期1924-1928,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21103129);山东省科技发展计划项目(批准号:2012YD17007)资助

摘　　要：测定了N-甲基哌嗪+乙酸乙酯和N-甲基哌嗪+乙酸丁酯2个二元混合体系在298.15,303.15,308.15和313.15 K的密度和黏度数据,并计算了N-甲基哌嗪+酯二元混合体系的超额摩尔体积(VEm)和黏度偏差(Δη),用Redlich-Kister多项式关联了二元体系的超额摩尔体积与组成的关系,用4个半经验公式关联黏度数据并关联了二元体系的黏滞性活化参数.结果表明,N-甲基哌嗪+乙酸乙酯和N-甲基哌嗪+乙酸丁酯二元体系在所测温度范围内的超额摩尔体积为正值,黏度偏差为负值,且二元混合体系在混合过程中焓驱动居于主导地位.Density and viscosity data for binary mixtures of N-methylpiperazine＋ethyl acetate and N-me-thylpiperazine＋butyl acetate were measured over the entire range of molar fraction at 298.15, 303.15, 308.15 and 313.15 K. Excess molar volume and viscosity deviations were calculated. Excess molar volumes were fitted to the Redlich-Kister equation. The viscosities were correlated with four semi-empirical equations. Thermodynamic functions of activation of the binary systems were correlated. The results show that the excess molar volumes are positive and the viscosity deviations are negative at given temperature, and ΔH≠ plays a major role in the mixing process.

关 键 词：二元混合体系 N-甲基哌嗪 超额摩尔体积 黏度关联 

分 类 号：O645[理学—物理化学]