SYNTHESIS AND CHARACTERIZATION OF SOLUBLE POLYAMIDES BASED ON 2,2-BIS[4-(4-AMINOPHENOXY)PHENYL]HEXAFLUOROPROPANE AND 2,2-BIS[4-(4-AMINOPHENOXY)PHENYL]PROPANE AND DIACID CHLORIDES

Aromatic soluble polyamides and copolyamides having hexafluoroisopropy lidene and isopropylidene moieties in the molecular structure of polym er chain were prepared by reacting the aromatic diacid chlorides and f luorine or nonfluorine containing aromatic diamines using low-temperat ure polycondensation process. Polymers were produced with high yield a nd moderate to high inherent viscosity. All polyimides and copolyamide s showed thermal stability above 440 degrees C and glass transition te mperature above 200 degrees C. Some of the polyamides were cast into t ransparent bulk films which were further characterized by mechanical, x-ray, and water absorption analysis. Fluoro polyamides showed superio r structural properties as compared to nonfluoro polyamides. (C) 1996 John Wiley & Sons, Inc.