Enhancing the Gas Permeability of Tröger’s Base Derived Polyimides of Intrinsic Microporosity

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• 作者：Michael Lee ; C. Grazia Bezzu ; Mariolino Carta ; Paola Bernardo ; Gabriele Clarizia ; Johannes C. Jansen ; Neil B. McKeown
• 刊名：Macromolecules
• 出版年：2016
• 出版时间：June 14, 2016
• 年：2016
• 卷：49
• 期：11
• 页码：4147-4154
• 全文大小：430K
• 年卷期：0
• ISSN：1520-5835

文摘

A series of four novel Tröger’s base (TB) derived polyimides of intrinsic microporosity (PIM–TB–PI) is reported. The TB diamine monomer (4MTBDA) possesses four methyl groups in order to restrict rotation about the C–N imide bonds in the resulting polymers. The polymers possess apparent BET (Brunauer, Emmett, and Teller) surface areas between 584 and 739 m² g^–1, complete solubility in chloroform, excellent molecular mass, high inherent viscosity and good film-forming properties. Gas permeability measurements demonstrate enhanced performance over previously reported polyimide-based Tröger’s base (TB) polymers confirming the benefit of the additional methyl groups within the TB diamine monomer. Notably, a polyimide derived from 4MTBDA and pyromellitic anhydride (PMDA) demonstrates gas permeability data above the 2008 upper bounds for important gas pairs such as O₂/N₂, H₂/N₂, and H₂/CH₄.