高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (8): 1924.doi: 10.7503/cjcu20130182

• 物理化学 • 上一篇    下一篇

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

李丹1, 方文军2, 刘莉1, 吴倩1, 张洪艳1, 孙晓日1   

  1. 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
  • 收稿日期:2013-02-27 出版日期:2013-08-10 发布日期:2013-07-19
  • 通讯作者: 李丹,女,博士,讲师,主要从事化学热力学研究.E-mail:danli830109@163.com E-mail:danli830109@163.com
  • 基金资助:

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

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

LI Dan1, FANG Wen-Jun2, LIU Li1, WU Qian1, ZHANG Hong-Yan1, SUN Xiao-Ri1   

  1. 1. College of Chemistry & Chemical and Environmental Engineering, Weifang University, Weifang 261061, China;
    2. Department of Chemistry, Zhejiang University, Hangzhou 310027, China
  • Received:2013-02-27 Online:2013-08-10 Published:2013-07-19

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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(VmE)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.

关键词: 二元混合体系, N-甲基哌嗪, 超额摩尔体积, 黏度关联

Abstract:

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.

Key words: Binary mixture, N-methylpiperazine, Excess molar volume, Viscosity data correlation

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