Densities, Refractive Indices, Ultrasonic Speeds and Excess Properties of Acetonitrile + Poly(ethylene glycol) Binary Mixtures at Temperatures from 298.15 to 313.15 K
Densities, Refractive Indices, Ultrasonic Speeds and Excess Properties of Acetonitrile + Poly(ethylene glycol) Binary Mixtures at Temperatures from 298.15 to 313.15 K
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乙腈 + 聚乙二醇二元混合物在 298.15 至 313.15 K 温度下的密度、折射率、超声波速度和过剩性能
DOI：
10.1007/s10953-014-0189-9
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发表时间：
2014
影响因子：
1.2
通讯作者：
A. Ali
中科院分区：
文献类型：
--
作者：
A. Nain;Sana Ansari;A. Ali
The densities, ρ, refractive indices, nD, and ultrasonic speeds, u, of binary mixtures of acetonitrile (AN) with poly(ethylene glycol) 200 (PEG200), poly(ethylene glycol) 300 (PEG300) and poly(ethylene glycol) 400 (PEG400) were measured over the entire composition range at temperatures (298.15, 303.15, 308.15 and 313.15) K and at atmospheric pressure. From the experimental data, the excess molar volumes, $$ V_{\text{m}}^{\text{E}} $$VmE, deviations in refractive indices, $$ \Delta n_{\text{D}} $$ΔnD, excess molar isentropic compressibility, $$ K_{{s , {\text{m}}}}^{\text{E}} $$Ks,mE, excess intermolecular free length, $$ L_{\text{f}}^{\text{E}} $$LfE, and excess acoustic impedance, ZE, have been evaluated. The partial molar volumes, $$ \overline{V}_{\text{m,1}} $$V¯m,1 and $$ \overline{V}_{\text{m,2}} $$V¯m,2, partial molar isentropic compressibilities, $$ \overline{K}_{{s , {\text{m,1}}}} $$K¯s,m,1 and $$ \overline{K}_{{s , {\text{m,2}}}} $$K¯s,m,2, and their excess values over whole composition range and at infinite dilution have also been calculated. The variations of these properties with composition and temperature are discussed in terms of intermolecular interactions in these mixtures. The results indicate the presence of specific interactions among the AN and PEG molecules, which follow the order PEG200 < PEG300 < PEG400.
The densities, ρ, refractive indices, nD, and ultrasonic speeds, u, of binary mixtures of acetonitrile (AN) with poly(ethylene glycol) 200 (PEG200), poly(ethylene glycol) 300 (PEG300) and poly(ethylene glycol) 400 (PEG400) were measured over the entire composition range at temperatures (298.15, 303.15, 308.15 and 313.15) K and at atmospheric pressure. From the experimental data, the excess molar volumes, $$ V_{\text{m}}^{\text{E}} $$VmE, deviations in refractive indices, $$ \Delta n_{\text{D}} $$ΔnD, excess molar isentropic compressibility, $$ K_{{s , {\text{m}}}}^{\text{E}} $$Ks,mE, excess intermolecular free length, $$ L_{\text{f}}^{\text{E}} $$LfE, and excess acoustic impedance, ZE, have been evaluated. The partial molar volumes, $$ \overline{V}_{\text{m,1}} $$V¯m,1 and $$ \overline{V}_{\text{m,2}} $$V¯m,2, partial molar isentropic compressibilities, $$ \overline{K}_{{s , {\text{m,1}}}} $$K¯s,m,1 and $$ \overline{K}_{{s , {\text{m,2}}}} $$K¯s,m,2, and their excess values over whole composition range and at infinite dilution have also been calculated. The variations of these properties with composition and temperature are discussed in terms of intermolecular interactions in these mixtures. The results indicate the presence of specific interactions among the AN and PEG molecules, which follow the order PEG200 < PEG300 < PEG400.