本研究針對碳酸二乙酯/碳酸丙烯酯、碳酸二乙酯/丙二醇及乙醇/碳酸丙烯酯等三系統，使用動態再循環裝置，進行常壓下汽液相平衡之量測，並以NRTL、UNIQUAC模式迴歸。其中以碳酸二乙酯/碳酸丙烯酯系統最為接近理想溶液行為，其餘兩組皆呈現正偏差之非理想溶液行為。對於所測量之汽液相平衡數據，同時進行了一致性之積分測試(Herington integral test)，所有數據皆通過熱力學一致性之檢驗。 吾人同時以密度儀量測了與碳酸丙烯酯、乙醇、碳酸二乙酯、丙二醇等四成分相關之六組二元系統之過剩容積，其中以丙二醇/碳酸丙烯酯及碳酸二乙酯/丙二醇等兩個系統，過剩容積呈現正偏差，其餘四組系統皆呈現負偏差，所有數據皆以Redlich-Kister模式來關聯。此外，亦使用熱卡計來量測了該六組二元系統之過剩焓值，其中僅以乙醇/碳酸丙烯酯系統呈現負偏差,其餘皆為正偏差，且以NRTL、Wilson模式及Redlich-Kister經驗式來關聯實驗數據，最後針對過剩熱焓之實驗數據，對於其分子間作用力做一探討。 In this study, isobaric vapor-liquid equilibrium (VLE) data at 101.3 kPa were measured using a dynamic recirculating still for the three binary systems of diethyl carbonate + propylene carbonate, diethyl carbonate + propylene glycol, and ethanol + propylene carbonate. All of the equilibrium data were correlated with the NRTL and UNIQUAC models.The VLE data of diethyl carbonate + propylene carbonate exhibit near- ideal solution behavior, whereas the other two systems show large positive deviation from the Raoult’s law. The thermodynamic consistency of the measured VLE data has been checked with the Herington integral method. They all pass the consistency test. The excess volume of six binary systems involving four species-i.e.) propylene carbonate, ethanol, diethyl carbonate, and propylene glycol were also measured by a oscillating densitometer. All of the excess volume data were correlated with the Redlich-Kister model. The systems of propylene glycol + propylene carbonate and diethyl carbonate + propylene glycol result in positive excess volume, while the remaining systems give negative deviations from the ideal solution.Additionally, excess enthalpy data of the six binary systems were determined using a calorimeter. The experimental data were fitted to the NRTL, Wilson, and Redlich-Kister models. The system of ethanol + propylene carbonate is the only system the exhibits negative deviation, although the other five systems give rise to positive excess enthalpy. In light of the measured excess enthalpy data, intermolecular interations of these systems were looked into.
