%0 journal article
%@ 0024-9297
%A Ghanem, B.S., McKeown, N.B., Budd, P.M., Al-Harbi, N.M., Fritsch, D., Heinrich, K., Starannikova, L., Tokarev, A., Yampolskii, Y.

%D 2009
%J Macromolecules
%N 20
%P 7881-7888 
%R doi:10.1021/ma901430q
%T Synthesis, Characterization, and Gas Permeation Properties of a Novel Group of Polymers with Intrinsic Microporosity: PIM-Polyimides
%U https://doi.org/10.1021/ma901430q
20 
%X 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.