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<p>The speeds of sound, <i>u</i> and viscosities, <i>η</i> of binary mixtures of ethyl acrylate with four isomeric butanols over the full composition range were measured at ambient temperatures and pressure, <i>p</i> = 100&#xa0;kPa. Using the measured data, viz<i>.</i>, excess isentropic compressibilities, excess intermolecular free lengths, excess speeds of sound, excess molar isentropic compressibilities, excess specific acoustic impedances and deviations in viscosity were evaluated. The partial molar isentropic compressibilities and excess partial molar isentropic compressibilities of the components over whole composition range; and at infinite dilution are calculated. The variation of these parameters has been interpreted in relations to intermolecular interactions in these mixtures. The results indicate that the extent of ethyl acrylate-alkanol interactions follow the order: 1-butanol &lt; 2-butanol &lt; 2-methyl-1-propanol &lt; 2-methyl-2-propanol. The viscosities of these mixtures were correlated by means of several empirical and semi-empirical equations and the speeds of sound were theoretically calculated using scaled particle theory and the outcomes are compared with experimental data. Further to confirm the nature and extent of prevailing intermolecular interactions, the FT-IR spectra of pure ethyl acrylate, isomeric butanols and their near equimolar mixtures were recorded and analyzed to support the prevailing interactions.</p>

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Thermophysical and Spectroscopic Investigation of Molecular Interactions in Ethyl Acrylate + Isomeric Butanol Binary Systems at Temperatures from 293.15 to 318.15 K: Experimental Results and Theoretical Modeling

  • 期刊论文

  • 发表日期：

    2025年10月22日

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  • Anil Kumar Nain,
  • Dinesh Chand

摘要

The speeds of sound, u and viscosities, η of binary mixtures of ethyl acrylate with four isomeric butanols over the full composition range were measured at ambient temperatures and pressure, p = 100 kPa. Using the measured data, viz., excess isentropic compressibilities, excess intermolecular free lengths, excess speeds of sound, excess molar isentropic compressibilities, excess specific acoustic impedances and deviations in viscosity were evaluated. The partial molar isentropic compressibilities and excess partial molar isentropic compressibilities of the components over whole composition range; and at infinite dilution are calculated. The variation of these parameters has been interpreted in relations to intermolecular interactions in these mixtures. The results indicate that the extent of ethyl acrylate-alkanol interactions follow the order: 1-butanol < 2-butanol < 2-methyl-1-propanol < 2-methyl-2-propanol. The viscosities of these mixtures were correlated by means of several empirical and semi-empirical equations and the speeds of sound were theoretically calculated using scaled particle theory and the outcomes are compared with experimental data. Further to confirm the nature and extent of prevailing intermolecular interactions, the FT-IR spectra of pure ethyl acrylate, isomeric butanols and their near equimolar mixtures were recorded and analyzed to support the prevailing interactions.