Mass Fraction Activity Coefficients at Infinite Dilution Measurements for Organic Solutes in the Dendritic Polymer PAMAM-Cu Using Inverse Gas Chromatography

摘要

The mass fraction activity coefficients at infinite dilution, Ω_(13)~∞, for 20 different solutes', alkanes (C6—C9), alkenes (C6, C7), alkynes (C6, C7), cycloalkanes (C6, C7), aromatic hydrocarbons (benzene, toluene, thiophene), alcohols (C1-C3), ethers (diethyl ether, dipropyl ether, tetrahydrofuran), and propanone were measured in the commercially available dendritic polymer PAMAM-C12 generation number 3, by inverse gas chromatography (IGC), at the temperatures from (298.15 to 318.15) K. The partial mass excess enthalpies of mixing at infinite dilution ΔH_1~(E,∞) were calculated from the experimental Ω_(13)~∞ values over the temperature range. The selectivity for different separation problems was calculated from Ω_(13)~∞ and compared to the literature values for the other polymers.