Citation: Ismet KAYA, Cigdem Yigit PALA. Determination of thermodynamic properties of poly(cyclohexyl methacrylate) by inverse gas chromatography[J]. Chinese Journal of Chromatography, ;2014, 32(7): 746-752. doi: 10.3724/SP.J.1123.2014.04028 shu

Determination of thermodynamic properties of poly(cyclohexyl methacrylate) by inverse gas chromatography

Ismet KAYA ^1,, ,
Cigdem Yigit PALA ^1,2

1.
1. Canakkale Onsekiz Mart University, Faculty of Sciences and Arts, Department of Chemistry, Polymer Synthesis and Analysis Laboratory, Canakkale 17020, Turkey;

Corresponding author: Ismet KAYA,
Received Date: 18 April 2014
Available Online: 16 May 2014

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_g⁰) was determined for each probe molecule. By using (1/T; lnV_g⁰) graphics, the glass transition temperature of poly(cyclohexyl methacrylate) was found to be 373 K. The adsorption heat under the glass transition temperature (ΔH_a), and partial molar heat of sorption above the glass transition (ΔH₁^S), partial molar free energy of sorption (ΔG₁^S) and partial molar entropy of sorption (ΔS₁^S) belonging to sorption for every probe were calculated. The partial molar heat of mixing at infinite dilution (ΔH₁^∞), partial molar free energy of mixing at infinite dilution (ΔG₁^∞), Flory-Huggins interaction parameter (χ₁₂^∞) and weight fraction activity coefficient (a₁/w₁)^∞ values of polymer-solute systems were calculated at different column temperatures. The solubility parameters (δ₂) of the polymer were obtained by IGC technique.
- inverse gas chromatography (IGC),
- poly(cyclohexyl methacrylate),
- thermodynamic properties
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沈阳化工大学材料科学与工程学院沈阳 110142