Summary
The retention diagrams of benzene, toluene, ethyl benzene, chloro benzene, n-propyl benzene, isopropyl benzene, methyl acetate, ethyl acetate, n-propyl acetate, n-butyl acetate and isoamyl acetate on the polycaprolactone were plotted at temperatures between 70 and 140oC by inverse gas chromatography technique. Percent crystallinity of polycaprolactone were obtained at temperatures below melting point from the retention diagrams of benzene, toluene and ethyl benzene. It was concluded that the data obtained by inverse gas chromatography were comparable those of obtained by differential scanning calorimetry. Specific retention volume, Vgo, Flory-Huggins polymer-solvent interaction parameters, χ12∞, the weight fraction activity coefficients of the solvents at infinite dilution, Ω1∞, effective exchange energy parameters, Xeff were determined. Later, the partial molar heat of sorption, ΔH1,sorp and the partial molar heat of mixing, ΔH1∞ were obtained from the slope of the logarithm of specific retention volume, Ln Vgo versus 1/T plot and from the slope of the logarithm of the weight fraction activity coefficients, Ω1∞versus 1/T plot, respectively.
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Sarac, A., Şakar, D., Cankurtaran, O. et al. The ratio of crystallinity and thermodynamical interactions of polycaprolactone with some aliphatic esters and aromatic solvents by inverse gas chromatography. Polym. Bull. 53, 349–357 (2005). https://doi.org/10.1007/s00289-005-0340-2
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DOI: https://doi.org/10.1007/s00289-005-0340-2