@misc{fritsch_polymers_of_2009, 
author={Fritsch, D., Heinrich, K., Bengtson, G.},
title={Polymers of Intrinsic Microporosity: Copolymers, improved Synthesis and Applications as Membrane Separation Material},
year={2009},
howpublished = {journal article},
abstract = {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].},
note = {Fritsch, D.; Heinrich, K.; Bengtson, G.: Polymers of Intrinsic Microporosity: Copolymers, improved Synthesis and Applications as Membrane Separation Material. PMSE Preprints. 2009. vol. 101, 761-762.}}