The present invention is a class of semi-permeable polyimide membranes and a process for using such membranes to separate one or more components of a gaseous mixture. The membranes are prepared from a polyimide having surface-modifiable functionalities comprising repeating units formed from an aromatic...http://www.google.fr/patents/US5045093?utm_source=gb-gplus-shareBrevet US5045093 - Gas separating membranes from polyimide polymers and a process for using the same
Gas separating membranes from polyimide polymers and a process for using the ...
