Issue 14, 2014

Novel thermally stable and soluble triarylamine functionalized polyimides for gas separation

Abstract

A novel series of solution-processable aromatic polyimide membranes with trimethyl-substituted triphenylamine units for gas separation were prepared from a newly synthesized dianhydride, N,N-bis(3,4-dicarboxyphenyl)-2,4,6-trimethylaniline dianhydride (2), and various diamines via one-step high-temperature solution polymerization. The corresponding polyimides derived from structurally related dianhydrides with different pendant groups such as phenyl, naphthyl, and pyrenyl moieties were also prepared for comparison. All the polyimides were readily soluble in many polar solvents and showed useful levels of thermal stability associated with high glass-transition temperatures (Tg, 324–455 °C) and high char yields (higher than 58% at 800 °C in nitrogen). The noncoplanar triphenylamine-containing polyimides IV with pendant trimethyl-phenyl moieties exhibited an effective improvement of gas permeability with a minor decrease in permselectivity.

Graphical abstract: Novel thermally stable and soluble triarylamine functionalized polyimides for gas separation

Supplementary files

Article information

Article type
Paper
Submitted
29 Mar 2014
Accepted
29 Apr 2014
First published
29 Apr 2014

Polym. Chem., 2014,5, 4219-4226

Novel thermally stable and soluble triarylamine functionalized polyimides for gas separation

H. Yen, J. Wu, Y. Huang, W. Wang, K. Lee and G. Liou, Polym. Chem., 2014, 5, 4219 DOI: 10.1039/C4PY00449C

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