Article ID Journal Published Year Pages File Type
217037 The Journal of Chemical Thermodynamics 2010 8 Pages PDF
Abstract

Thermodynamic properties of the hyperbranched polymer, Boltorn H2004 (B-H2004), were investigated by inverse gas chromatography with 42 different solvents: n-alkanes (C5–C10), cycloalkanes (C5–C8), alkenes (C5–C8), alkynes (C5–C8), aromatic hydrocarbons (benzene, toluene, ethylbenzene, o-, m-, p-xylene, thiophene), alcohols (C1–C5), water, ethers (tetrahydrofuran (THF), methyl-tert-butylether (MTBE), diethyl-, di-n-propyl-, di-n-butyl ether), and ketones (acetone, 2-pentanone, 3-pentanone, 2-hexanone, 3-hexanone, cyclopentanone) at the temperatures from (308.15 to 348.15) K using the inverse gas chromatography (IGC). The density and thermophysical properties of polymer were described. The specific retention volume (Vg  ), the mass-fraction activity coefficient at infinite dilution (Ω13∞), the Flory–Huggins interaction parameter (χ13∞), the molar enthalpy of sorption in the polymer (ΔsH)(ΔsH), the partial molar excess enthalpy at infinite dilution (ΔH1E,∞), the molar enthalpy of vaporization to the ideal-gas state for the pure solutes (ΔvapH0)(ΔvapH0), the partial molar Gibbs excess energy at infinite dilution (ΔG1E,∞), and the solubility parameter of the polymer (δ3), were calculated. The UNIFAC-FV model was used to predict the mass-fraction activity coefficient at infinite dilution for different solutes in the B-H2004 polymer.

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Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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