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
- Authors
- Belov, Nikolay A.; Nizhegorodova, Yulia A.; Kim, Seungju; Han, Sang Hoon; Yampolskii, Yuri P.; Lee, Young Moo
- Issue Date
- Aug-2013
- Publisher
- AMER CHEMICAL SOC
- Citation
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.52, no.31, pp.10467 - 10475
- Indexed
- SCIE
SCOPUS
- Journal Title
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
- Volume
- 52
- Number
- 31
- Start Page
- 10467
- End Page
- 10475
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/134003
- DOI
- 10.1021/ie3034027
- ISSN
- 0888-5885
- 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).
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