Abstract
A range of polyimides with characteristics similar to a polymer of intrinsic microporosity (PIM) were prepared by reaction with various aromatic diamines of a bis(carboxylic anhydride) incorporating a spiro-center. The polymers exhibited high surface area, as determined by nitrogen adsorption, and high thermal stability. Membrane gas permeation experiments showed PIM-polyimides to be among the most permeable of all polyimides and to have selectivities close to the upper bound for several important gas pairs. A group contribution method was used to predict permeability coefficients and separation factors for further PIM-polyimide structures, revealing worthwhile targets for future synthetic efforts. © 2009 American Chemical Society.
Original language | English |
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Pages (from-to) | 7881-7888 |
Number of pages | 7 |
Journal | Macromolecules |
Volume | 42 |
Issue number | 20 |
DOIs | |
Publication status | Published - 27 Oct 2009 |