Static dielectric constants of 1,2-dichloroethane + 2-methoxyethanol + 1,2-dimethoxyethane ternary liquid mixtures from −10 to 80°C

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• 作者：Corradini ; Fulvio ; Marchetti ; Andrea ; Tagliazucchi ; Mara ; Tassi ; Lorenzo
• 关键词：Data ; Dielectric constant ; Excess properties ; 1 ; 2-dichloroethane ; 2-methoxyethanol ; 1 ; 2-dimethoxyethane
• 刊名：Fluid Phase Equilibria
• 出版年：1996
• 出版时间：September 15, 1996
• 年：1996
• 卷：124
• 期：1-2
• 页码：209-220
• 全文大小：668 K

文摘

Static dielectric constants (œ) were measured for mixtures of 1,2-dichloroethane (DCE, 1) + 2-methoxyethanol (ME, 2) + 1,2-dimethoxyethane (DME, 3) at 19 temperatures in the range −10 ≤ t/°C ≤ 80, employing 12 ternaries covering the whole composition range expressed by the mole fractions 0 < X₁, X₂,X₃ < 1. Empirical fitting equations of the type œ = œ (T), œ = œ(X_i) and œ = œ(T,X_i), which might be useful for correlation and interpolation procedures, were used to represent the experimental data. The excess mixing property œ^E has been evaluated to investigate the presence of solvent-cosolvent adducts at each temperature. The quantity œ^E has been found to be partly positive and partly negative in the ternary domain {X₁, X₂,X₃ }. As a consequence, it is possible to observe an isoline at œ^E = 0 at each temperature. Such a line represents a large set of ternary mixtures having a pseudo-ideal dielectric behavior, even being formed by interacting components.