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Thermophysical and transport properties of binary mixtures containing triethylene glycol and alcohols at different temperatures

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Abstract

Densities and viscosities have been measured for the binary mixtures of triethylene glycol with + 2-propanol, 2-butanol and 2-pentanol over the entire range of mole fraction at T = 293.15–323.15 K. From experimental data, the excess molar volume, thermal expansion coefficient, excess thermal expansion coefficient and deviation in viscosity were calculated. The experimental results have been discussed in terms of molecular interactions and formation of molecular complexes between unlike molecules. Influence of temperature and carbon chain length of alcohols on mentioned properties was discussed. Moreover, the friction theory coupled with PC-SAFT equation of state was applied to produce the viscosities of pure data and binary mixtures.

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Abbreviations

MW i :

Molecular weight of component i

p a :

Attraction pressure

p r :

Repulsion pressure

z :

Mass-weighted fraction of component

η :

Total viscosity

η 0 :

Dilute gas viscosity

η f :

Friction viscosity

η a :

Attractive viscosity scaling parameter

η r :

Reduced viscosity

\( \kappa_{\text{a}} \) :

Linear attractive viscous friction coefficient

\( \kappa_{\text{r}} \) :

Linear repulsive viscous friction coefficient

\( \kappa_{\text{rr}} \) :

Quadratic repulsive viscous friction coefficient

A :

Helmholtz energy

\( a_{0} \) :

Segment molar Helmholtz energy (seg), per mole of segments

k :

Boltzmann’s constant

m :

Effective number of segments within the molecule

\( \in^{\text{AB}} \) :

Association energy of interaction between sites A and B

\( k_{\text{ij}} \) :

Binary interaction parameter

ε :

Molecular segment energy parameter

ω :

Acentric factor

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Acknowledgements

The author thanks the Islamic Azad University (Ahvaz Branch, Ahvaz) for providing the facilities to carry out this work.

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Authors and Affiliations

  1. Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

    Mohammad Almasi

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  1. Mohammad Almasi
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Correspondence to Mohammad Almasi.

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Almasi, M. Thermophysical and transport properties of binary mixtures containing triethylene glycol and alcohols at different temperatures. J Therm Anal Calorim 124, 399–405 (2016). https://doi.org/10.1007/s10973-015-5127-6

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  • DOI: https://doi.org/10.1007/s10973-015-5127-6

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