Research Papers by Gunter Scharfenberger

A 6FDA (4,4‘-hexafluoro isopropylidene diphthalic anhydride) based copolyimide has been synthesized containing the diamines DABA (3,5-diamino benzoic acid) and a 15-crown-5-diamine to separate propylene/ propane mixtures. With the carboxylic acid group of DABA crosslinking the polymer chains is poss