%0 journal article
%@ 1550-6703
%A Fritsch, D., Heinrich, K., Bengtson, G.

%D 2009
%J PMSE Preprints

%P 761-762 

%T Polymers of Intrinsic Microporosity: Copolymers, improved Synthesis and Applications as Membrane Separation Material
%U 
 
%X Intrinsic microporosity is one of the most important properties of high free volume polymers. If one arranges all known polymers by increasing free volume in a continuous line, at the endpoint, merely a very few polymers with extremely high free volume of above 20% can be named. Today, only some polyacetylenes (best known polytrimethylsilylpropyne (PTMSP)), Teflon copolymers (Teflon® AF-types, Hyflon® AD), one silylated polynorbornene and PIM polymers are identified. PIM polymers, known since 2004 [1], are ladder type polycondensates composed of flat dioxane rings and sites of contortion. Their exceptional basic properties as membrane separation materials have been recovered recently [2].