中文摘要：

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.

英文摘要：

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.