Aromatic Polyimide Membranes with tert -Butyl and Carboxylic Side Groups for Gas Separation Applications-Covalent Crosslinking Study

A set of aromatic copolyimides was obtained by reaction of 4,4'-(hexafluoroisopropylidene) diphthalic anhydride (6FDA), and mixtures of the diamines 1,4-bis(4-amino-2-trifluoromethylphenoxy)-2,5-di- -butylbenzene (CF TBAPB) and 3,5-diamino benzoic acid (DABA). These polymers were characterized...

Ausführliche Beschreibung