
Keywords: دافا; 6FDA; 2,2â²-bis (3,4-dicarboxyphenyl) hexafluoropropane dianhydride; 6FDA-DAM/DABA; 2,2â²-bis(3,4-dicarboxyphenyl) hexafluoropropane dianhydride-2,4,6-trimethyl-1,3-diaminobenzene/3,5-diaminobenzoic acid; 6FDA-MDA/DABA,FMD; 2,2â²-bis(3,4-dicarboxypheny