草酸二乙酯與五種有機溶劑雙成分混合物之密度與黏度量測

Density and viscosity measurements of binary mixtures of diethyl oxalate with ethanol, toluene, tetrahydrofuran, N,N-dimethylformamide and ethyl acetate

林美君(Mei-Jyun Lin)

指導教授 ： 蘇至善

國立臺北科技大學/工程學院/化學工程研究所/碩士(2014年)

摘要

本研究量測草酸二乙酯(Diethyl oxalate)與五種有機溶劑所組成之二成分混合
物的密度與黏度數據。所考慮的五種有機溶劑包含乙醇(Ethanol)、甲苯(Toluene)、N,N-二甲基甲醯胺(N,N-Dimethylformamide)、乙酸乙酯(Ethyl acetate)與四氫呋喃(Tetrahydrofuran)。量測之溫度為303.15、313.15 與323.15 K，量測之草酸二乙酯(Diethyl oxalate)莫耳分率由0.1 至0.9，其量測之間隔為0.1。除密度與黏度量測外，本研究亦由測得之數據，計算草酸二乙酯與有機溶劑二成分混合物之過剩莫耳體積(Excess molar volume)與黏度偏差值(Deviation of viscosity)。在過剩莫耳體積方面， Diethyl oxalate 與Ethanol 以及Diethyl oxalate 與Tetrahydrofuran 兩組二
成分混合物具有正偏差行為，其他三組二成分混合物則皆為負偏差。在黏度偏差
值方面，僅Diethyl oxalate 與N,N-Dimethylformamide 二成分混合物為正偏差，其餘系統則皆為負偏差。此外，亦藉由四參數Redlich-Kister 方程式進行過剩莫耳體積與黏度偏差值之回歸計算，皆可得到滿意之計算結果。

關鍵字

草酸二乙酯 ； 密度與黏度 ； 過剩莫耳體積 ； 黏度偏差

並列摘要

In this study, density and viscosity data of five binary mixtures consisted of diethyl oxalate and organic solvent are reported. Five solvents including ethanol, toluene, tetrahydrofuran, N,N-dimethylformamide and ethyl acetate are considered in our measurement. Density and viscosity data of these five binary mixtures are measured at 303.15, 313.15 and 323.15 K and mole fraction of diethyl oxalate at 0.1,
0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 and 0.9. In addition, excess molar volume and deviation of viscosity are also calculated from our experimental data. According to the results of excess molar volume, two binary mixtures of diethyl oxalate + ethanol and diethyl oxalate + tetrahydrofuran are positive deviations while the others three binary mixtures are negative deviations. On the other hand, for deviation of viscosity, only binary mixture of diethyl oxalate + N,N-dimethylformamide is positive deviation and the other four binary mixtures are negative deviations. Furthermore, the calculated excess molar volumes and deviations of viscosity are also correlated using a four parameter Redlich-Kister equation. In this study, satisfactory correlated results are obtained and finally presented.

並列關鍵字

Diethyl oxalate ； Density ； viscosity ； Excess molar volume ； Deviation of viscosity

參考文獻

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