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Thermophysical Properties Analysis of Poly (Ethylene Glycol) 600 + Methanol, Ethanol, 1-Propanol, and 2-Propanol Binary Liquid Mixtures

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Abstract

In this work, a series of thermophysical properties (apparent specific volume, excess molar volume, excess Gibbs energy of activation for viscous flow, coefficient of thermal expansion, excess coefficient of thermal expansion) of poly (ethylene glycol) 600 (PEG600) + methanol, ethanol, 1-propanol, and 2-propanol binary liquid mixtures were determined based on density and viscosity experimental measures at 293.15 K, 298.15 K, and 303.15 K and refractive indices at 298.15 K. After that, the obtained excess parameters were used to analyze the inter-intra molecular interactions in the liquid mixtures. In order to estimate the interaction parameters, the excess molar volume results were fitted to Redlich–Kister polynomial. Moreover, a set of semi-empirical relations were proposed to predict the viscosity of liquid mixtures.

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References

  1. 1.

    F.J. Argüelles-Vivas, T. Babadagli, L. Little, High temperature density, viscosity, and interfacial tension measurements of bitumen–pentane–biodiesel and process water mixtures. J. Chem. Eng. Data 57, 2878–2889 (2012)

  2. 2.

    M. Ahmasi, B. Sarkoohaki, Densities and viscosities of binary mixtures of cyclohexanone and 2-alkanols. J. Chem. Eng. Data 57, 309–316 (2012)

  3. 3.

    F. Lovell, R.M. Marcos, L.F. Vega, Free-volume theory coupled with soft-SAFT for viscosity calculations: comparison with molecular simulation and experimental data. J. Phys. Chem. 117, 8159–8171 (2013)

  4. 4.

    M.A. Serebryakova, S.V. Dimov, S.P. Bardakhanov, S.A. Novopashin, Thermal conductivity, viscosity and rheology of a suspension based on Al2O3 nanoparticles and mixture of 90% ethylene glycol and 10% water. Int. J. Heat Mass Transf. 83, 187–191 (2015)

  5. 5.

    L. Sapir, C.B. Stanley, D. Harries, Properties of poly vinyl pyrrolidone in a deep eutectic solvent. Int. J. Heat Mass Transf. 120, 3253–3259 (2016)

  6. 6.

    M.D. Bajic, R.G. Ivanis, P.Z. Visak, M.E. Zivkovic, P.S. Serbanovic, L.J.M. Kijevcanin, Densities, viscosities, and refractive indices of the binary systems (PEG200 + 1,2-propanediol, +1,3-propanediol) and (PEG400 + 1,2-propanediol, +1,3-propanediol) at (288.15 to 333.15) K and atmospheric pressure: measurements and modeling. J. Chem. Thermodyn. 57, 510–529 (2013)

  7. 7.

    M. Yasmin, M. Gupa, J. Shukla, Experimental and computational study on viscosity and optical dielectric constant of solutions of poly (ethylene glycol) 200. J. Mol. Liq. 160, 22–29 (2011)

  8. 8.

    D.J. Heldebrant, H.N. Witt, S.M. Walsh, T. Ellis, J. Rauscher, P.G. Jessop, Green Chem. 8, 807–815 (2006)

  9. 9.

    I.W. Kim, M.D. Jang, Y.K. Ryu, E.H. Cho, Y.K. Lee, J.H. Park, Dipolarity, hydrogen-bond basicity and hydrogen-bond acidity of aqueous poly(ethylene glycol) solutions. Anal. Sci. 18, 1357–1360 (2002)

  10. 10.

    Z.P. Visak, L.M. Ilharco, A. Garcia, V. Najdanovic-Visak, J.M.N.A. Fareleira, F.J.P. Caetano, M.L.J. Kijevcanin, S.P. Serbanovic, J. Phys. Chem. 115, 8481–8492 (2011)

  11. 11.

    D. Rudan-Tasic, C. Klofutar, Apparent specific polarization and dipole moment of some poly(oxyethylene) glycols in 1,4-dioxane and benzene solutions at 298.15 K. Monatsh. Chem. 136, 1171–1182 (2005)

  12. 12.

    J.M. Vuksanović, D.M. Bajić, G.R. Ivaniš, E.M. Živković, I.R. Radović, S.P. Šerbanović, M.L.J. Kijevčanin, Prediction of excess molar volumes of selected binary mixtures from refractive index data. J. Serb. Chem. Soc. 79, 707–718 (2014)

  13. 13.

    J.M. Harris (ed.), Poly (Ethylene Glycol) Chemistry: Bio-technical and Biomedical Applications (Plenum Press Inc, New York, 1992), pp. 7–12

  14. 14.

    H.A. Favre, W.H. Powell, Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013 (Blue Book) (The Royal Society of Chemistry, Cambridge, 2014), p. 61

  15. 15.

    N.G. Connelly, T. Damhus, R.M. Hartshorn, A.T. Hutton, Nomenclature of Inorganic Chemistry: IUPAC Recommendations, 2005; International Union of Pure and Applied Chemistry; The Royal Society of Chemistry: Cambridge, England, 2005

  16. 16.

    W. Reeve, C.M. Erikson, P.F. Aluotto, A new method for the determination of the relative acidities of alcohols in alcoholic solutions. The nucleophilicities and competitive reactivities of alkoxides and phenoxides. Can. J. Chem. 57, 2747–2754 (1979)

  17. 17.

    R. Battino, Volume changes on mixing for binary mixtures of liquids. Chem. Rev. 71, 5–45 (1971)

  18. 18.

    A. Jouyban, Handbook of Solubility Data for Pharmaceuticals (CRC Press, Boca Raton (FL), 2010)

  19. 19.

    S. Soltanpour, A. Jouyban, Solubility of acetaminophen and ibuprofen in binary and ternary mixtures of polyethylene glycol 600, ethanol and water. Chem. Pharm. Bull. 58, 219–224 (2010)

  20. 20.

    A.V. Rajulu, P.M. Sab, Ultrasonic studies of water/poly (ethylene glycol) mixtures. Eur. Polym. J. 32, 267–268 (1996)

  21. 21.

    G.A. Rodríguez, A.R. Holguín, F. Martínez, Volumetric properties of (PEG 400 + water) and (PEG 400 + ethanol) mixtures at several temperatures and correlation with the Jouyban-Acree model. Rev Colomb. Cienc. Quím. Farm. 41, 187–202 (2012)

  22. 22.

    M.M. Muñoz, A.D. Tinjacá, A. Jouyban, F. Martínez, E.W. Acree, Volumetric properties of {PEG 200 (or 300) (1) + water (2)}mixtures at several temperatures and correlation with the Jouyban-Acree model. Phys. Chem. Liq. 56, 100–109 (2017)

  23. 23.

    M. Rahbari-Sisakht, M. Taghizadeh, A. Eliassi, Densities and viscosities of binary mixtures of poly(ethylene glycol) and poly(propylene glycol) in water and ethanol in the 293.15-338.15 K temperature range. J. Chem. Eng. Data 48, 1221–1224 (2003)

  24. 24.

    A. Mehrdad, R. Akbarzadeh, Effect of temperature and solvent composition on the intrinsic viscosity of poly(ethylene glycol) in water-ethanol solutions. J. Chem. Eng. Data 55, 2537–2541 (2010)

  25. 25.

    N.V. Ž̌ivković, S.S. Šerbanović, M.L. Kijevčanin, E.M. Živković, Volumetric and viscometric behavior of binary systems 2‑butanol + PEG 200, + PEG 400, + tetraethylene glycol dimethyl ether, and + N‑methyl-2-pyrrolidone. J. Chem. Eng. Data 58, 3332–3341 (2013)

  26. 26.

    M.T. Zafarani-Moattar, N. Tohidifar, Vapor–liquid equilibria, density, speed of sound, and viscosity for the poly(ethylene glycol) 400 + 1-propanol and 1-butanol systems. J. Chem. Eng. Data 53, 785–793 (2008)

  27. 27.

    M.M. Muñoz, A.D. Tinjacá, A. Jouyban, F. Martínez, E.W. Acree, Study of some volumetric and refractive properties of PEG 300 (1) + ethanol (2) mixtures at several temperatures. Phys. Chem. Liq. 56, 391–402 (2017)

  28. 28.

    J. Jiménez, F. Martínez, Volumetric properties of ethanol + 1,2-propanediol mixtures at different temperatures. Phys. Chem. Liq. 44, 521–530 (2006)

  29. 29.

    F. Martínez, J.H. Rojas, Un método refracto-densimétrico para el análisis de mezclas líquidas ternarias homogéneas [A refracto-densimetric method for composition analysis of homogeneous ternary liquid mixtures]. Rev. Colomb. Cienc. Quím. Farm. 28, 45–51 (1999)

  30. 30.

    M.V. Castillo, M.A. Checa, M.E. Manzur, Experimental study of the dielectric behavior of tinidazole in acetone at 25 °C. Vitae. Rev. Fac. Quím. Farm. 17, 299–308 (2010)

  31. 31.

    C. Aucouturier, G. Roux-Desgranger, A.H. Roux, Excess molar volumes and excess molar heat capacities of (polyethylene glycols + water) at temperatures between T = 278 K and T = 328 K. J. Chem. Thermodyn. 31, 289–300 (1999)

  32. 32.

    K. Zhang, J. Yang, X. Yu, J. Zhang, X. Wei, Densities and viscosities for binary mixtures of poly(ethylene glycol) 400 + dimethyl sulfoxide and poly(ethylene glycol) 600 + water at different temperatures. J. Chem. Eng. Data 56, 3083–3088 (2011)

  33. 33.

    M.A. Awwad, H.A. Al-Dujaili, E.H. Salman, Relative permittivities, densities, and refractive indices of the binary mixtures of sulfolane with ethylene glycol, diethylene glycol, and poly(ethylene glycol) at 303.15 K. J. Chem. Eng. Data. 47, 421–424 (2002)

  34. 34.

    T. Zhao, X. Qiao, Q. Xu, X. Xie, X. Wei, J. Zhang, Solubility and spectral investigation of dilute SO2 in the binary system polyethylene glycol 600 + water and system’s density, viscosity, and surface tension. J. Mol. Liq. 223, 224–234 (2016)

  35. 35.

    S. Trivedi, C. Bhanot, Densities of poly (ethylene glycol) + water over the temperature range (283.15 to 363.15) K. J. Chem. Thermodyn. 42, 1367–1371 (2010)

  36. 36.

    C. Bhanot, S. Trivedi, A. Gupta, S. Pandey, Dynamic viscosity versus probe-reported microviscosity of aqueous mixtures of poly (ethylene glycol). J. Chem. Thermodyn. 45, 137–144 (2012)

  37. 37.

    A.F. Portugal, J.M. Sousa, F.D. Magalhaes, A. Mendes, Solubility of carbon dioxide in aqueous solutions of amino acid salts. Chem. Eng. Sci. 64, 1993–2002 (2009)

  38. 38.

    S. Trivedi, S. Pandey, Densities of 1-butyl-3-methylimidazolium hexafluorophosphate + poly(ethylene glycol) in the temperature range (283.15 to 363.15) K. J. Chem. Eng. Data 56, 2168–2174 (2011)

  39. 39.

    A. Valtz, M. Teodorescu, I. Wichterle, D. Richon, Liquid densities and excess molar volumes for water + diethylene glycolamine, and water, methanol, ethanol, 1-propanol + triethylene glycol binary systems at atmospheric pressure and temperatures in the range of 283.15–363.15 K. Fluid Phase Equilib. 215, 129–142 (2004)

  40. 40.

    J.A. Riddick, B.W. Bunger, T. Sakano, Organic Solvents, 4th edn. (Wiley, New York, 1986)

  41. 41.

    B. Gonzalez, A. Domínguez, J. Tojo, Dynamic viscosities, densities, and speed of sound and derived properties of the binary systems acetic acid with water, methanol, ethanol, ethyl acetate and methyl acetate at T = (293.15, 298.15, and 303.15) K at atmospheric pressure. J. Chem. Eng. Data 49, 1590–1596 (2004)

  42. 42.

    S. Villa, N. Riesco, I. Garcia de la Fuente, J.A. Gonzales, J.C. Cobos, Thermodynamics of mixtures with strongly negative deviations from Raoult´s law. Part 6. Excess molar volumes at 29815 K for 1-alkanols + dibutylamine systems. Characterization in terms of the ERAS model. Fluid Phase Equilib. 198, 313–329 (2002)

  43. 43.

    M.A. Rauf, G. Stewart, H. Farhataziz, Viscosities and densities of binary mixtures of 1-alkanols from 15 to 55 °C. J. Chem. Eng. Data 28, 324–328 (1983)

  44. 44.

    A. Rodríguez, J. Canosa, J. Tojo, Physical properties of binary mixtures (dimethyl carbonate + alcohols) at several temperatures. J. Chem. Eng. Data 46, 1476–1486 (2001)

  45. 45.

    V.H. Alvarez, S. Mattedi, M. Martín-Pastor, M. Aznar, M. Iglesias, Thermophysical properties of binary mixtures of {ionic liquid 2-hydroxy ethylammonium acetate plus (water, methanol, or ethanol)}. J. Chem. Thermodyn. 43, 997–1010 (2011)

  46. 46.

    TRC Thermodynamic Tables; Thermodynamic Research Center: Texas A&M University, College Station, TX, d-5000, 1994

  47. 47.

    J. Herraiz, S. Shen, J. Fernandez, A. Coronas, Thermophysical properties of methanol + some polyethylene glycol dimethyl ether by UNIFAC and DISQUAC group-contribution models for absorption heat pumps. Fluid Phase Equilib. 155, 327–337 (1999)

  48. 48.

    X. Esteve, D. Boer, K.R. Patil, S.K. Chaudhari, A. Coronas, Densities, viscosities, and enthalpies of mixing of the binary system methanol + polyethylene glycol 250 dimethyl ether at 303.15 K. J. Chem. Eng. Data 39, 767–769 (1994)

  49. 49.

    G.E. Papanastasiou, A.D. Papoutsis, G.I. Kokkinidis, Physical behavior of some reaction media density, viscosity, dielectric constant, and refractive index changes of ethanol-dioxane mixtures at several temperatures. J. Chem. Eng. Data 32, 377–381 (1987)

  50. 50.

    B. Mokhtarani, A. Sharifi, H.R. Mortaheb, M. Mirzaei, M. Mafi, F. Sadeghian, Density and viscosity of 1-butyl-3-methylimidazolium nitrate with ethanol, 1-propanol, or 1-butanol at several temperatures. J. Chem. Thermodyn. 41, 1432–1438 (2009)

  51. 51.

    E. Álvarez, A. Cancela, R. Maceiras, J.M. Navaza, R. Táboas, Density, viscosity, excess molar volume, and viscosity deviation of three amyl alcohols + ethanol binary mixtures from 293.15 to 323.15 K. J. Chem. Eng. Data 51, 940–945 (2006)

  52. 52.

    D. Constantinescu, I. Wichterle, Isothermal vapour–liquid equilibria and excess molar volumes in the binary ethanol + methyl propanoate or methyl butanoate systems. Fluid Phase Equilib. 203, 71–82 (2002)

  53. 53.

    R. Francesconi, F. Comelli, Excess enthalpies and excess volumes of the liquid binary mixtures of propylene carbonate + six alkanols at 298.15 K. J. Chem. Eng. Data. 41, 1397–1400 (1996)

  54. 54.

    T. Aminabhavi, K. Benerjee, Density, viscosity, refractive index, and speed of sound in binary mixtures of 2-chloroethanol with alkanols (C1–C6) at 298.15, 303.15, and 308.15 K. J. Chem. Eng. Data 43, 509–513 (1998)

  55. 55.

    R. Salinas, J. Pla-Franco, E. Lladosa, J.B. Monton, Density, speed of sound, viscosity, and excess properties of binary mixtures formed by ethanol and bis(trifluorosulfonyl)imide-based ionic liquids. J. Chem. Eng. Data 60, 525–540 (2015)

  56. 56.

    A.M. Crabtree, J.F. Obrien, Excess viscosities of binary-mixtures of chloroform and alcohol. J. Chem. Eng. Data 36(1991), 140–142 (1991)

  57. 57.

    E. Quijada-Maldonado, G.W. Meindersma, A.B. de Haan, Viscosity and density data for the ternary system water(1)-ethanol(2)-ethylene glycol(3) between 298.15 K and 328.15 K. J. Chem. Thermodyn. 57, 500–505 (2013)

  58. 58.

    S.L. Oswal, H.S. Desat, Studies of viscosity and excess molar volume of binary mixtures 1-Propylamine + 1-alkanol mixtures at 303.15 and 313.15 K. Fluid Phase Equilib. 149, 359–376 (1998)

  59. 59.

    G.J. Janz, R.P.T. Tomkins, Nonaqueous Electrolytes Handbook (Academic, New York, 1972)

  60. 60.

    F.M. Pang, C.H.E. Seng, T.T. Teng, M.H. Ibrahim, Densities and viscosities of aqueous solutions of 1-propanol and 2-propanol at temperatures from 293.15 K to 333.15 K. J. Mol. Liq. 136, 71–78 (2007)

  61. 61.

    J.A. Dean, Lange’s Handbook of Chemistry, 15th edn. (McGraw–Hill, New York, 1999)

  62. 62.

    M. Gupta, I. Vibhu, J.P. Shukla, Ultrasonic velocity, viscosity and excess properties of binary mixture of tetrahydrofuran with 1-propanol and 2-propanol. Fluid Phase Equilib. 244, 26–32 (2006)

  63. 63.

    M.E. de Ruiz Holgado, C.R. de Schaefer, E.L. Arancibia, Viscosity study of 1-propanol with polyethylene glycol 350 monomethyl ether systems at different temperatures. J. Mol. Liq. 79, 257–267 (1999)

  64. 64.

    A. Salabat, M. Alinoori, Viscosity, density and refractive index of poly(vinylpyrrolidone) + 1-propanol and + 2-propanol at 298.15 K. J. Chem. Eng. Data 54, 1073–1075 (2009)

  65. 65.

    A.R. Riddick, W.B. Bunger, T.K. Sakano, Organic Solvents. Techniques of chemistry, 4th edn. (Wily-Interscience, New York, 1986)

  66. 66.

    Z. Shan, A.F. Asfour, Viscosities and densities of nine binary 1-alkanol systems at 293.15 K and 298.15 K. J. Chem. Eng. Data 44, 118–123 (1999)

  67. 67.

    K. Sollman, E. Marschall, Viscosity of selected binary, ternary, and quaternary liquid mixtures. J. Chem. Eng. Data 35, 375–381 (1990)

  68. 68.

    M.J. Lee, T.K. Lin, Y.H. Pai, K.S. Lin, Density and viscosity for monoethanolamine PLUS 1-propanol, Plus 1-hexanol, and plus 1-octanol. J. Chem. Eng. Data 42, 854–857 (1997)

  69. 69.

    TRC Thermodynamic Tables; Thermodynamic Research Center: Texas A&M University, College Station, TX, d-5030, 1994

  70. 70.

    S.Z. Mikhail, W.R. Kimel, Densities and viscosities of 1-propanol-water mixtures. J. Chem. Eng. Data 8, 323–326 (1963)

  71. 71.

    G. Quyang, Z. Huang, J. Ou, W. Wu, B. Kang, Excess molar volumes and surface tensions of xylene with 2-propanol or 2-methyl-2-propanol at 298.15 K. J. Chem. Eng. Data 48, 195–197 (2003)

  72. 72.

    R.A. McAllister, The viscosity of liquid mixtures. AIChE J. 6, 427–431 (1960)

  73. 73.

    R. Francesconi, F. Comelli, Excess enthalpies and excess volumes of the liquid binary mixtures of propylene carbonate + six alkanols at 298.15 K, J. Chem. Eng. Data. 41 (1996) 1397–1400

  74. 74.

    J.A. Riddick, W.B. Bunger, T.K. Sakano, Organic Solvents, Physical Properties and Methods of Purifications, 4th edn. (Wiley-Interscience, New York, 1986)

  75. 75.

    B. Gonzlez, N. Calvar, E. Gonzlez, F. Domnguez, Density and viscosity experimental data of the ternary mixtures 1-propanol or 2-propanol + water + 1-ethyl-3-methylimidazolium ethylsulfate correlation and prediction of physical properties of the ternary systems. J. Chem. Eng. Data 53, 881–887 (2008)

  76. 76.

    M.J. Lee, T.K. Lin, Density and viscosity for monoethanolamine + water + ethanol, and + 2-propanol authors. J. Chem. Eng. Data 40, 336 (1995)

  77. 77.

    C. Yang, P. Ma, Q. Zhou, Excess molar volume, viscosity, and heat capacity for the mixtures of 1,4-butanediol + water at different temperatures. J. Chem. Eng. Data 49, 582–587 (2004)

  78. 78.

    Q. Tian, H. Liu, Densities and viscosities of binary mixtures of tributyl phosphate with hexane and dodecane from (298.15 to 328.15) K. J. Chem. Eng. Data 52, 892–897 (2007)

  79. 79.

    L. Bernazzani, C. Duce, A. Micheli, V. Mollica, M.R. Tine, Quantitative structure–property relationship (QSPR) prediction of solvation Gibbs energy of bifunctional compounds by recursive neural networks. J. Chem. Eng. Data 55, 5425–5428 (2010)

  80. 80.

    U. Domanaska, M. Zawadzki, A. Lewandrowska, Effect of temperature and composition on the density, viscosity, surface tension, and thermodynamic properties of binary mixtures of N-octylisoquinolinium bis{(trifluoromethyl)sulfonyl}imide with alcohols. J. Chem. Thermodyn. 48, 101–111 (2012)

  81. 81.

    S. Trivedi, C. Bhanot, S. Pandey, Phase compositions, molar mass, and temperature effect on densities, viscosities, and liquid-liquid equilibrium of polyethylene glycol and salt-based aqueous two-phase systems. J. Chem. Thermodyn. 42, 1367–1371 (2010)

  82. 82.

    L. Grunberg, A.H. Nissan, Mixture law for viscosity. Nature 164, 799–800 (1949)

  83. 83.

    M. Tamura, M. Kurata Bull, Viscosity of binary mixtures of cycloalkane with cycloalkane, alkane and aromatic hydrocarbon at 303.15 K. Chem. Soc. Jpn. 25, 32–37 (1952)

  84. 84.

    H. Eyring, M.S. John, Significant Liquid Structure (Wiley, New York, 1969)

  85. 85.

    U.R. Kapadi, D.G. Hundiwale, N.B. Patil, M.K. Lande, Effect of temperature on excess molar volumes and viscosities of binary mixtures of ethylenediamine and water. Fluid Phase Equilib. 205, 267–274 (2003)

  86. 86.

    R.J. Bearman, P.F. Jones, Statistical mechanical theory of the viscosity coefficients of binary liquid solutions. J. Chem. Phys. 33, 1432–1438 (1960)

  87. 87.

    A.A. Rostami, M.J. Chaichi, M. Sharifi, Densities, viscosities, and excess gibbs energy of activation for viscous flow, for binary mixtures of dimethyl phthalate (DMP) with 1-pentanol, 1-butanol, and 1-propanol at two temperatures. Monatshefte fur Chem. 138, 967–971 (2007)

  88. 88.

    J.C.R. Reis, I.M.S. Lampreia, A.F.S. Santos, M.L.C.J. Moita, G. Douheret, Refractive index of liquid mixtures: theory and experiment. Chem. Phys. Chem. 11, 3722–3733 (2010)

  89. 89.

    P. Alfaro, E. Langa, J.F. Martinez, J.S. Urieta, A.M. Mainar, Thermophysical properties of the binary mixtures (1,8-cineole + 1-alkanol) at T = (298.15 and 313.15) K and at atmospheric pressure. J. Chem. Thermodyn. 42, 291–303 (2010)

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Mousavi, Z., Pirdashti, M., Rostami, A.A. et al. Thermophysical Properties Analysis of Poly (Ethylene Glycol) 600 + Methanol, Ethanol, 1-Propanol, and 2-Propanol Binary Liquid Mixtures. Int J Thermophys 41, 19 (2020). https://doi.org/10.1007/s10765-019-2600-7

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Keywords

  • Alcohol
  • Density
  • Excess property
  • Poly (ethylene glycol)
  • Refractive index
  • Viscosity