Research Information System
Journal of Chromatographic Science, vol.62, no.1, pp.1-7, 2024 (SCI-Expanded)
The aim of this study is to examine the interactions of composite materials obtained by adding single-walled carbon nanotubes (SWCNT) to polyetherimide (ULTEM) in different weight ratios with various organic solvents, and to evaluate the solubility of composites in these organic solvents. The characterization of prepared composites was performed with SEM analysis. Thermodynamic properties of ULTEM/SWCNT composites were determined by the inverse gas chromatography (IGC) method at 260–285◦C in infinite dilution. According to the IGC method, the retention behaviors were examined by passing different organic solvent vapors over the composites used as stationary phase, and retention diagrams were drawn using the obtained retention data. Thermodynamic parameters including Flory–Huggins interaction parameters (χ12∞), equation of state interaction parameters (χ12∗ ), weight fraction activity coefficients in infinite dilution (Ω∞1 ), effective exchange energy parameters (χeff), partial molar sorption enthalpies (∆HS1), partial molar dissolution enthalpies in infinite dilution (∆H∞1 ) and molar evaporation enthalpies (∆Hv) were calculated using the linear retention diagrams. According to χ12∞, χ12∗ , Ω∞1 and χeff values, organic solvents were found to be poor solvents for composites at all temperatures. Besides, the solubility parameters of composites were determined by IGC method at infinite dilution.