%0 journal article
%@ 1550-6703
%A Budd, P.M.,Selbie, J.D.,Awal, M.A.,McKeown, N.B.,Ghanem, B.S.,Msayib, K.J.,Fritsch, D.

%D 2007
%J PMSE Preprints
%N 
%P 276-277 

%T Intrinsic Microporosity in Polyimides
%U 
 
%X Polymers with molecular structures that cannot pack efficiently in the solid state and therefore trap a large amount of free volume may be regarded as having “intrinsic microporosity” (effective pore dimensions <2 nm). Polymers of intrinsic microporosity (PIMs) typically have rigid backbones (e.g., ladder-like sequences) and incorporate sites of contortion (e.g., spiro-centers) that force the backbone to twist and turn. Here we describe a novel polyimide that incorporates features of a PIM. We also demonstrate that other polyimides that exhibit very high permeability to gases may be regarded as “intrinsically microporous”.