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Solid–liquid equilibrium, thermal and physicochemical studies of organic eutectics

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Abstract

The solid–liquid phase equilibrium data of two binary organic systems, namely, urea (U)–3-aminophenol (AP) and 3-hydroxybenzaldehyde (HB)–β-napthaol (BN) show formation of a eutectic in each case. The enthalpies of fusion of the pure components and binary eutectics have been determined using differential scanning calorimeter (Mettler DSC-4000) system. The thermal properties of the materials such as heat of mixing, entropy of fusion, roughness parameter, interfacial energy and excess thermodynamic functions were computed using the enthalpy of fusion values. The microstructures of eutectics were developed using unidirectional thermal gradient and interested region were photographed.

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Acknowledgements

Authors are grateful thanks to the Board of Research in Nuclear Science, for financial support, and also thanks to Department of Chemistry, BHU for providing infrastructure.

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Authors and Affiliations

  1. Department of Chemistry, Centre of Advanced Study, Faculty of Science, Banaras Hindu University, Varanasi, 221 005, India

    R. S. B. Reddi, V. S. A. Kumar Satuluri & R. N. Rai

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  1. R. S. B. Reddi
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  2. V. S. A. Kumar Satuluri
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  3. R. N. Rai
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Reddi, R.S.B., Kumar Satuluri, V.S.A. & Rai, R.N. Solid–liquid equilibrium, thermal and physicochemical studies of organic eutectics. J Therm Anal Calorim 107, 183–188 (2012). https://doi.org/10.1007/s10973-011-1634-2

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