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Thermodynamical study of poly( n ‐hexyl methacrylate) with some solvents by inverse gas chromatography
Author(s) -
Yazici Ozlem,
Sakar Dolunay,
Cankurtaran Ozlem,
Karaman Ferdane
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34288
Subject(s) - inverse gas chromatography , enthalpy , hildebrand solubility parameter , chemistry , solubility , flory–huggins solution theory , entropy of mixing , activity coefficient , enthalpy change of solution , solvent , dilution , thermodynamics , ethyl acetate , polymer chemistry , gas chromatography , polymer , organic chemistry , chromatography , aqueous solution , physics
The retention volume diagrams of ethyl acetate, isobutyl acetate, tert ‐butyl acetate, benzene, n ‐hexane, n ‐heptane, n ‐octane, acetone, chloroform, and acetonitrile on the poly( n ‐hexyl methacrylate) (PHMA) were plotted at temperature ranges from 333 to 393 K by inverse gas chromatography technique. Some polymer‐solvent thermodynamic interaction parameters, such as weight fraction activity coefficient, Ω 1 ∞ , Flory‐Huggins, χ 12 ∞ , hard‐core, χ 12 * , and some exchange parameters such as effective energy, X eff , enthalpy, X 12 , and entropy, Q 12 , were determined for studied solvents at infinite dilution of PHMA at temperatures mentioned above. Then the partial molar heat, $\Delta \overline H_1^s$ , and free energy, $\Delta \overline G_1^s$ , of sorption as well as the partial molar heat, $\Delta \overline H_1^\infty$ , and free energy, $\Delta \overline G_1^\infty$ , of mixing at infinite dilution were determined. In addition, the solubility parameter of PHMA, δ 2 , was determined as 8.8 (cal/cm 3 ) 1/2 at room temperature by extrapolation of the values of solubility parameters from studied temperatures to 298 K. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011