Volumetric, acoustic, and viscometric studies of molecular interactions in binary mixtures of diethylene glycol monomethyl ether with 1-alkanols at temperatures from (293.15 to 308.15) K
Introduction
Specific molecular interactions in liquid mixtures can be deduced from measurements of excess properties. The systematic investigations of these excess properties are therefore of great importance. The compound DEGMME, commonly known as 2-(2-methoxyethoxy) ethanol, is a widely used industrial solvent. From a theoretical point of view, mixtures containing hydroxyethers are very important, not only because of their self-association but also due to the strong intramolecular effects which is produced by the presence of –O– and –OH groups in the same molecule [1]. Physicochemical and thermodynamic investigations play an important role in helping to understand the nature and the extent of the patterns of molecular aggregation that exist in binary liquid mixtures and their sensitivities to variations in composition and the molecular structure of the pure components. The experimental values of excess thermodynamic properties of liquid mixtures provide useful information about molecular interactions and can be used to test thermodynamic models. The DEGMME binary mixtures with 1-hexanol, 1-octanol, and 1-decanol help us to understand the effect of the increasing chain length in alkanol molecules on the excess thermodynamic properties. Ethers and 1-alkanols are also used in the chemical industry as a solvent for oils and petrol and are used in gasoline formulation as enhancement of octane rating or fuel additives. Investigations into the literature have shown that excess properties of binary mixtures containing ethers have previously been studied by several authors (Pal et al. [2], [3], [4], [5], [6], [7], Tovar et al. [8], and Cobos et al. [9]).
We report in this paper the measurements on density ρ, speed of sound u, and viscosity η of binary mixtures containing CH3(OCH2CH2)2OH with CH3(CH2)5OH, CH3(CH2)7OH, and CH3(CH2)9OH at T = (293.15, 298.15, 303.15, and 308.15) K and atmospheric pressure over the whole composition range. Using the experimental values of ρ, u, and η, the excess functions and deviations such as , , , and have been calculated. The aim of this work is to provide databases for the characterization of molecular interactions in the present binaries and also to study the effect of alcohol chain-length as well as temperature on molecular interactions during mixing.
Section snippets
Experimental
The diethylene glycol monomethyl ether, 1-hexanol, 1-octanol, and 1-decanol (all SD Fine Chemicals, India, HPLC, spectroscopic & analytical grade) were stored over sodium hydroxide pellets for several days and fractionally distilled twice [10], [11]. The middle fraction of the distillate was used. Prior to experimental measurements, all liquids were stored in dark bottles over 0.4 nm molecular sieves to reduce water content, and were partially degassed with a vacuum pump under a nitrogen
Results and discussion
The experimental results for density, speed of sound, and excess functions and deviations such as , , and of all the binary mixtures of DEGMME are summarized in TABLE 2, TABLE 3, TABLE 4. The excess molar volumes of the binary mixtures were computed by applying the following equation:where Mi and are the molar mass and density of pure component, respectively, and ρ is the density of the mixture.
The isentropic compressibility κS, deviations in isentropic
Conclusions
In this paper, an attempt is made to report new measurements of density, speed of sound and viscosity at T = (293.15 to 308.15) K over the entire range of mixture composition for (DEGMME + 1-hexanol, 1-octanol, and 1-decanol). Various excess properties and deviations , , , and calculated using experimental results support the existence of weak dispersive forces in these types of mixtures.
Acknowledgement
Financial support for the work (Letter No. F. 14-2(SC)/2008 (SA-III) dated 31-03-2009) by the Government of India through University Grants Commission (UGC), New Delhi, is gratefully acknowledged.
References (34)
- et al.
Thermochim. Acta
(2000) - et al.
J. Chem. Thermodyn.
(2004) - et al.
J. Chem. Thermodyn.
(1990) - et al.
J. Chem. Thermodyn.
(2008) - et al.
J. Chem. Thermodyn.
(2009) - et al.
Indian J. Phys.
(2004) - et al.
J. Solut. Chem.
(2001) - et al.
Indian J. Phys.
(2001) - et al.
Indian J. Chem.
(1999) - et al.
Pure Appl. Ultrason.
(1999)
J. Chem. Eng. Data
J. Chem. Eng. Data
J. Chem. Eng. Data
J. Chem. Eng. Data
Organic Solvents, Physical Properties and Method of Purifications
J. Chem. Soc., Faraday Trans.
J. Solut. Chem.
Cited by (18)
Acoustic, volumetric and spectral studies of binary liquid mixtures of aliphatic dialkylamine and 2-alkanols at different temperatures
2019, Journal of Chemical ThermodynamicsCitation Excerpt :Alkanols have a well known wide range of applications. Some of these applications are their use as solvents, fuel, oxygenates in fuel [3], in pharmaceutical industry and in many chemical processes. Therefore, the thermodynamic study of the binary mixtures containing these components will be very helpful and interesting.
FT-IR studies and excess thermodynamic properties of binary liquid mixtures 2-(2-butoxyethoxy) ethanol with 1-hexanol, 1-octanol and 1-decanol at different temperatures
2018, Journal of Chemical ThermodynamicsCitation Excerpt :The provenance and mass fraction purities tested by gas chromatography were reported in Table 1. The purities of solvents were further ascertained by comparing their densities, speeds of sound and viscosities at different temperatures with values reported in the literature [15–25] as shown in Table 2 and also given in the Figures S1 and S2 of Supplementary information. Each binary mixture were prepared by weighing appropriate amounts of 2-(2-butoxyethoxy) ethanol and each alcohol mentioned above on an A&D Company limited electronic balance (Japan, Model GR-202) electronic balance, with a precision of ±0.01 mg, by syringing each component into airtight narrow mouthed stoppered bottles to minimize evaporation losses.
Studies of mixing properties of binary systems of di-n-butylamine with alkanols at T = (293.15, 298.15, 303.15, 308.15 and 313.15) K
2017, Journal of Molecular LiquidsThermo physical and FT-IR study on binary mixtures of 2-isopropoxy ethanol and alcohols at different temperatures
2017, Journal of Molecular LiquidsCitation Excerpt :The provenance and mass fraction purities tested by gas chromatography were reported in Table 1. The purities of solvents were further ascertained by comparing their densities, speeds of sound and viscosities at 298.15 K with values reported in the literature [15–24] as shown in Table 2. All the binary mixture were prepared by weighing appropriate amounts of 2-Isopropoxy ethanol and each alcohol mentioned above on an A&D Company limited electronic balance (Japan, Model GR-202) electronic balance, with a precision of ± 0.01 mg, by syringing each component into airtight narrow mouthed stoppered bottles to minimize evaporation losses.
Molecular interactions in 2-isopropoxy ethanol + alcohols: A thermo-physical and spectroscopic approach
2016, Journal of Molecular Liquids