Poly(1,3,4-oxadiazole-ether-imide)s and their polydimethylsiloxane-containing copolymers

摘要: Abstract Poly(1,3,4-oxadiazole-ether-imide)s were prepared by thermal imidization of poly(amic-acid) intermediates resulting from the solution polycondensation reaction a bis(ether-anhydride), namely 2,2′-bis-[(3,4-dicarboxyphenoxy)phenyl]-1,4-phenylenediisopropylidene dianhydride, with different aromatic diamines containing 1,3,4-oxadiazole ring, such as 2,5-bis( p -aminophenyl)-1,3,4-oxadiazole, 2,5-bis[ -(4-aminophenoxy)phenyl]-1,3,4-oxadiazole, 2-(4-dimethylaminophenyl)-5-(3,5-diaminophenyl)-1,3,4-oxadiazole. Poly(1,3,4-oxadiazole-ether-imide)–polydimethylsiloxane copolymers same bis(ether-anhydride) equimolar quantities an diamine having ring and bis(aminopropyl)polydimethylsiloxane oligomer controlled molecular weight. A procedure was used to convert quantitatively corresponding polyimides. All polymers easily soluble in polar organic solvents N -methylpyrrolidone , -dimethylacetamide. The showed good stability decomposition temperature being above 400 °C. Solutions some exhibited blue fluorescence, maximum emission wavelength range 370–412 nm.