Role of Intrachain Rigidity in the Plasticization of Intrinsically Microporous Triptycene-Based Polyimide Membranes in Mixed-Gas CO2/CH4 Separations

• Published in: Macromolecules Vol. 47; no. 21; pp. 7453 - 7462
• Main Authors: Swaidan, Raja, Ghanem, Bader, Al-Saeedi, Majed, Litwiller, Eric, Pinnau, Ingo
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 11.11.2014
• Subjects: Applied sciences; carbon dioxide; cellulose acetate; Exact sciences and technology; Exchange resins and membranes; Forms of application and semi-finished materials; methane; Polymer industry, paints, wood; porous media; sorption; superoxide anion; Technology of polymers; Gas absorption; Molecular rigidity; Polyimide; Transport properties; Porous membrane; Fluorine containing polymer; Head to head polymer; Experimental study; Dimension spectrum; Gas permeability; Pore size; Selective permeability; Property structure relationship; Semiladder polymer

Based on high-pressure pure- and mixed-gas (50:50) CO2/CH4 separation properties of two intrinsically microporous triptycene-based polyimides (TPDA–TMPD and TPDA–6FpDA), the intrachain rigidity central to “conventional PIM” design principles is not a singular solution to intrinsic plasticization res...