Asymmetric polymer film, method for the production and utilization thereof
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United States of America Patent
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Nov 16, 2010
Grant Date -
Jan 31, 2008
app pub date -
Feb 16, 2007
filing date -
Jul 11, 2003
priority date (Note) -
Expired
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Abstract
The present invention relates to an asymmetric polymer film, in particular based on polazoles, a method for the production of the same and its use. The polyazole-based asymmetric polymer film according to the invention has a smooth and a rough side and enables, on account of its asymmetric structure, rapid and homogeneous doping with acids to form a proton-conducting membrane. The polyazole-based asymmetric polymer film according to the invention can be used in diverse ways on account of its excellent chemical, thermal and mechanical properties and is particularly suitable for the production of polymer electrolyte membranes (PEM) for so-called PEM fuel cells.
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