Density, viscosity, and speed of sound of binary liquid mixtures of vinyl acetate with butyl vinyl ether, diisopropyl ether, anisole and dibutyl ether
Introduction
The availability of reliable excess thermodynamic and transport properties are required in industries for the process of design and development. The study of these properties has proved to be a useful tool in elucidating the structural interactions between component molecules. Numerous reports [1], [2], [3], [4] have described the role of molecular interactions of the solvent species to determine the specific interactions which are responsible for the cause of deviations in non-electrolyte solutions.
Vinyl acetate is an amorphous polymer that offers good adhesion to most surfaces. Poly vinyl acetate offers acceptable gap-filling capability. It may be used as a resinous component of latex paints and offers compatibility with a wide range of other paint chemicals. It is mostly used as a thermosetting adhesive. These numerous applications of vinyl acetate have proved this ester as one of the most industrially important organic solvents. Likewise due to fast changing trends of the environmental concerns, the need for oxygenated compounds (ethers) are becoming important because of diminishing petroleum reserves and increasing air pollution. The oxygenated fuels are mostly octane enhancers and reduce carbon monoxide emission. Therefore it is of interest to study the mixing behaviour of vinyl acetate with ethers.
A survey of literature reveals that studies on excess properties of binary mixtures of vinyl acetate with various organic solvents [5], [6], [7], [8], [9], [10], [11] are substantial. However to the best of our knowledge, there are no reports in literature on the excess properties for binary mixtures of vinyl acetate containing ethers. This consideration has led us to undertake the present investigation. In this paper we report the density (ρ), viscosity (η), and speeds of sound (u) for (vinyl acetate + butyl vinyl ether), (vinyl acetate + diisopropyl ether), (vinyl acetate + anisole), (vinyl acetate + dibutyl ether) at temperatures (303.15, 308.15 and 313.15) K and 0.1 MPa with an aim to investigate the molecular interactions. Using these experimental values, excess volumes (VE), deviation in viscosity (Δη), isentropic compressibility (KS) and deviation in isentropic compressibility (ΔKS) have been calculated. These results are fitted to the Redlich-Kister type polynomial equation [12] to derive the binary coefficients and to estimate the standard deviations (σ).The viscosity mole fraction data pairs were used to test some correlating viscosity models proposed by Hind [13], Heric [14], and McAllister (4-body) [15].
Section snippets
Materials
Vinyl acetate, butyl vinyl ether, diisopropyl ether, anisole, and dibutyl ether (mass fraction purity >0.980) all procured from Sigma-Aldrich. The purity of all these chemicals was checked by Gas chromatography (GC-8610,) and the analysis of the purity was found to be >0.984. Data on the investigated pure chemicals,their suppliers and stated purities and purification methods are given in Table 1. These chemicals were stored over 0.4 nm molecular sieves to reduce water content and distilled just
Results and discussion
Table 3 lists values of densities ρ, excess volumes VE, viscosities η, speeds of sound u, isentropic compressibility KS, and the mole fractions x1 of vinyl acetate for the studied binary mixtures at (303.15, 308.15 and 313.15) K. The excess volumes VE of the binary mixtures were calculated from the densities of pure liquids and their mixtures using the equation.where ρ12 is the density of the binary mixture, x1, M1, ρ1, and x2, M2, ρ2 are the mole fraction, molar
Correlation of viscosity models
In order to calculate and predict viscosity values of liquid mixtures in this study, we have selected one parameter model of Hind [13], two parameter model of Heric [14], and three parameter model of McAllister (4-body) [15]. The ability of these models was tested by using the viscosity measurements of studied systems. Hind (13) proposed the following one parameter relation.η12 is interaction parameter. Heric(14) proposed the following two – Parameter equation;
Conclusions
Density, viscosity and speed of sound for binary systems of (vinyl acetate + butyl vinyl ether, +diisopropyl ether, + anisole, + dibutyl ether) have been determined over the entire range of composition at (303.15, 308.15 and 313.15) K. Using these experimental values, excess volumes VE, deviation in viscosity Δη, isentropic compressibility KS, and deviation in isentropic compressibility ΔKS were calculated. These excess or deviation properties were fitted to the Redlich-Kister polynomial
Acknowledgement
The authors sincerely acknowledge the principal, Dr. M. K. Pejaver for providing the necessary infrastructure and financial support to carry out the present research work.
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