Akademik Veri Yönetim Sistemi
CHINESE JOURNAL OF CHROMATOGRAPHY, cilt.32, sa.7, ss.746-752, 2014 (ESCI, Scopus)
In this work, some thermodynamic properties of poly(cyclohexyl methacrylate) were studied by inverse gas chromatography (IGC). For this purpose, the polymeric substance was coated on Chromosorb W and which was filled into a glass column. The retention times (t(r)) of the probes were determined from the interactions of poly (cyclohexyl methacrylate) with n-pentane, n-hexane, n-heptane, n-octane, n-decane, methanol, ethanol, 2-propanol, butanol, acetone, ethyl methyl ketone, benzene, toluene and o-xylene by IGC technique. Then, the specific volume (V-g(0)) was determined for each probe molecule. By using (1/T; 1nV(g)(0)) graphics, the glass transition temperature of poly(cyclohexyl methacrylate) was found to be 373 K. The adsorption heat under the glass transition temperature (Delta H-a), and partial molar heat of sorption above the glass transition (Delta H-1(s)), partial molar free energy of sorption (Delta G(1)(s)) and partial molar entropy of sorption (Delta S-1(s)) belonging to sorption for every probe were calculated. The partial molar heat of mixing at infinite dilution (Delta H-1(infinity)), partial molar free energy of mixing at infinite dilution (Delta G(1)(infinity)) , Flory-Huggins interaction parameter (chi(infinity)(12)) and weight fraction activity coefficient (a(1)/w(1))(infinity) values of polymer-solute systems were calculated at different column temperatures. The solubility parameters (delta(2)) of the polymer were obtained by IGC technique.