TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The aromatic diamine is 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl, 2,2'-bis(trifluoromethoxyl)-4,4'-diaminobiphenyl, 2,2'-bis(trifluoromethyl)-4,4'-diaminodiphenyl ether, 1,4-bis(4-amino-2-trifluoromethylphenyloxy)benzene, 4,4'-bis(4-amino-2-trifluoromethylphenyloxy)biphenyl, 9,9'-bis(4-aminophenyl)fluorene or 9,9'-bis(3-fluoro-4-aminophenyl)fluorene. The aromatic diacid dichloride is terephthaloyl dichloride, isophthaloyl dichloride, 2,6-naphthaloyl dichloride or 4,4,-biphenyldicarbonyl dichloride. The polar solvent is N,N-dimethylacetamide or N-methylpyrrolidone. The acid trapping reagent is an alkylene oxide which is propylene oxide. The acid trapping reagent is a tertiary amine or an inorganic salt. The multifunctional epoxide is diglycidyl 1,2-cyclohexanedicarboxylate, triglycidyl isocyanurate, tetraglycidyl 4,4'-diaminophenylmethane, 2,2-bis(4-glycidyloxyphenyl)propane and its higher molecular weight homologs, novolac epoxide, 7H-indeno(1,2-b:5,6-b')bisonireneoctahydro or epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate. The diamine contains 1-10 mol.% of carboxy group, based on the total diamine mixture. The diamine that contains carboxy group is 4,4,-diaminodiphenic acid or 3,5-diaminobenzoic acid. The film has a thickness of greater than 4 mu m to less than 100 mu m, preferably 10 mu m. The film is adhered to a substrate, where the substrate is a glass film with a thickness of greater than 50 mu m.    TECHNOLOGY FOCUS - POLYMERS - Preferred Process: In the process: the polymerization is carried out at -10 degrees C to 30 degrees C; and the heating step is carried out under reduced pressure or an inert atmosphere, where the temperature is less than 280 degrees C (preferably 250-280 degrees C) for 1-30 minutes. Preferred Components: The multifunctional epoxide is present at 1-10 wt.% based on the weight of the polyamide. The multifunctional epoxide is present at 1-10 wt.% based on the weight of the copolyamide. The polyamide has a glass transition temperature (Tg) of greater than 300 degrees C. EXAMPLE - 2,2'-Bis(trifluoromethyl)-4,4'-diaminobiphenyl (3.2024 g), propylene oxide (1.4 g) and dried N,N-dimethylacetamide (45 ml) were added to round bottom flask (250 ml). The resulting solution was cooled to 10 degrees C in an ice/water bath. Isophthaloyl dichloride (0.6395 g) was added, and the flask wall was washed with N,N-dimethylacetamide (1.5 ml) to remove any adhering terephthaloyl dichloride (TPC). After 15 minutes, TPC (1.4211 g) was added, and the flask wall was again washed with N,N-dimethylacetamide (1.5 ml). The resulting viscous, homogenous solution was stirred for another 4 hours. Triglyceride (0.45 g) was added, and the reaction mixture was stirred for another 2 hours. The resulting solution was cast directly into film.