Density and Derived Properties of Binary Mixtures Containing {2-(Dimethylamino)ethyl Methacrylate + Alcohols} at Temperatures from T = (293.15 to 313.15) K and Pressures of up to 35 MPa

2019 ◽  
Vol 64 (5) ◽  
pp. 1909-1921
Author(s):  
Dereck Nills F. Muche ◽  
Gustavo Vieira Olivieri ◽  
Ricardo Belchior Torres
2001 ◽  
Vol 39 (1) ◽  
pp. 99-116 ◽  
Author(s):  
B. Orge ◽  
B. E. De Cominges ◽  
G. Marino ◽  
M. Iglesias ◽  
J. Tojo

2017 ◽  
Vol 82 (10) ◽  
pp. 1155-1174 ◽  
Author(s):  
Rebecca Andrade ◽  
Alberto Carreras ◽  
Miguel Iglesias

Two binary mixtures of protic ionic liquids comprising formate, acetate and propionate anions and 2-hydroxyethyl ammonium, bis(2-hydroxyethyl) ammonium and tris(2-hydroxyethyl) ammonium cations have been studied in terms of volumetric and acoustic properties as a function of temperature. The corresponding derived properties have been computed from the experimental data and fitted to temperature dependent Redlich?Kister and Redlich? ?Mayer equations; accurate results being obtained. Other properties such as intermolecular free length, acoustic impedance, geometrical volume, collision factor and isothermal coefficient of pressure excess molar enthalpy were computed due to their importance in the study of specific molecular interactions. The new experimental data were used to test the prediction capability of different models for density (Mchaweh?Nasrifar?Moshfeghian (MNM) model and the modified Heller temperature dependent equation (MHE)) and ultrasonic velocity (different empirical equations, collision factor theory (CFT) and free length theory (FLT)). The high non-ideality of these mixtures points to strong contractive behaviour at any temperature and composition. The obtained results indicate that ionic liquid interactions into mixture are stronger than in the ionic pure components for both mixtures at any studied condition. Despite the strong ion interaction, the tested models showed, at least, the qualitative prediction capability.


2020 ◽  
Vol 2 (2) ◽  
pp. 83-96

The aim of the present investigation is to analyze the effect of carbon chain length in benzene + (hexane/heptane) binary mixtures at different temperatures through density (ρ), ultrasonic velocity (U), viscosity (η) and dielectric (ε) measurements. Derived properties such as molar volume (V), isentropic compressibility (βs), acoustic impedance (Z) and intermolecular free length (Lf) have been calculated for T = 298.15, 308.15 and 318.15K. The excess values of the above mentioned properties of the binary mixtures of benzene + (hexane/heptane) are determined at different temperatures and have been fitted to Redlich – Kister polynomial equation. The dielectric permittivity results demonstrate that deviations from pure components are mostly negative in both the mixtures except for few cases in benzene rich region. Excess Gibb’s free energy of activation of viscous flow (GE) has been calculated using the viscosity measurements at different temperatures. Mixing rules have been adopted to calculate the ultrasonic velocities of the binary mixtures of benzene + (hexane/heptane) at the above said temperatures. FT-IR and NMR analysis have been done to check the accuracy of the results.


1988 ◽  
Vol 20 (6) ◽  
Author(s):  
M. Dolores Blanco ◽  
Jos�M. Teij�n ◽  
Jos�A. Onrubia ◽  
Issa Katime

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