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Solution and diffusion properties of cyclohexane, cyclohexanol, and cyclohexanone in poly(ethylene glycol) by inverse gas chromatography
Author(s) -
Zeng Chuyi,
Huang Min,
Zhao Hong,
Zhou Jicheng,
Li Jiding
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34447
Subject(s) - inverse gas chromatography , cyclohexanol , cyclohexane , cyclohexanone , ethylene glycol , solvent , polymer , diffusion , polymer chemistry , peg ratio , chemistry , materials science , chemical engineering , thermodynamics , organic chemistry , catalysis , economics , physics , finance , engineering
The solution and diffusion properties of cyclohexane, cyclohexanol, and cyclohexanone in poly(ethylene glycol) (PEG) and crosslinked PEG have been studied in the temperature range of 368.15 to 403.15 K using inverse gas chromatography (IGC) technique. The infinite dilute activity coefficient (Ω ip ∞ ) and diffusion coefficient ( D ip ∞ ) have been determined for the above solvent/polymer systems. Accordingly, several thermodynamic functions, the diffusion pre‐exponential factor, and activation energy have been attained. The results showed a decrease in Ω ip ∞and an increase in D ip ∞with rising temperature. The order of the relative magnitude of Ω ip ∞and D ip ∞of the solvents were explained by comparing their interactions with the polymer and their collision diameters, respectively. Moreover, Ω ip ∞and D ip ∞in crosslinked PEG were smaller than those in PEG at various temperatures. The analysis of Ω ip ∞ , the infinite dilute selectivity and capacity showed the possibility of using crosslinked PEG as an appropriate membrane material for the separation of cyclohexane, cyclohexanol, and cyclohexanone mixture. A thermodynamic study also implied that the solvent sorptions in the polymers were all enthalpically driven in the experimental range. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011.