Structural organization of ethyl esters based on hexafluoropropene oxide oligomers: Inverse gas chromatography study
Tóm tắt
Samples of ethyl esters of perfluorinated acids based on hexafluoropropene oxide oligomers with molecular masses of 2000, 3100, and 4500 are used as stationary phases, and their interactions with low-molecular-mass compounds (sorbates) of different natures are studied by inverse gas chromatography. The linear dependence of the specific retention volumes for alkanes, cyclohexane, aromatic hydrocarbons, tetrachloromethane, and trifluorotrichloroethane (CFC-113) on inverse molecular masses of the oligomer samples is ascribed to the quasi-biphasic structure of the liquid oligomers. The experimental dependences of specific retention volumes on inverse molecular masses of oligomer samples make it possible to estimate the main thermodynamic characteristics of sorbate interaction with individual quasi-phases and their solubility parameters directly related to the cohesion-energy density.
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