Inverse Gas Chromatographic Study of Sorption Thermodynamics in Thermally Rearranged Polymer Based on 2,2-Bis(3-amino-4-hydroxyphenyl)-hexafluoropropane and 4,4 '-Hexafluoroisopropylidene Diphthalic Anhydride
- Title
- Inverse Gas Chromatographic Study of Sorption Thermodynamics in Thermally Rearranged Polymer Based on 2,2-Bis(3-amino-4-hydroxyphenyl)-hexafluoropropane and 4,4 '-Hexafluoroisopropylidene Diphthalic Anhydride
- Author
- 이영무
- Keywords
- FINITE-CONCENTRATIONS; TRANSPORT PROPERTIES; PARAMETERS; SEPARATION; PERMEATION; POLYIMIDES; SOLUBILITY; MEMBRANES; PRESSURE; DIFFUSION
- Issue Date
- 2013-04
- Publisher
- AMER CHEMICAL SOC
- Citation
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, April 2013, 52(31), P.10467-10475
- Abstract
- This work reports the first investigation using the inverse gas chromatography method of a polyimide precursor and the product of its thermal rearrangement (TR polymer), extensively studied earlier. Sorption of gases (CO2, C2H6, C3H8) was studied at the finite dilution regime, while vapors (n-alkanes C-7, C-8, C-10, C-14, C-16) were investigated at infinite dilution. It was demonstrated that thermal treatment at 450 degrees C results in a significant increase in the solubility coefficients S for large gas molecules. The absolute values observed for the TR polymer solubility coefficients of solutes are significant and comparable with those for the polymer of intrinsic microporosity (PIM-1), the polymer known by the greatest S values among all of the polymers studied. Sorption thermodynamics in the TR polymer is distinguished by very large and negative mixing parameters: enthalpy (h) over bar (E,infinity)(1) and entropy (s) over bar (E,infinity)(1).
- URI
- http://dx.doi.org/10.1021/ie3034027http://hdl.handle.net/20.500.11754/44189
- ISSN
- 0888-5885
- DOI
- 10.1021/ie3034027
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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