New aromatic polyamideimides – syntheses and thermal and photoluminescent properties
Polimery 2008, No 6, 427
New aromatic polyamideimides (PAI) were synthesized by high temperature polycondensation from diamidedianhydrides (formerly prepared by us) and diamines: 1,5-diaminonaphthalene, 4,4'-(hexafluoro-isopropylidene)-dianiline or 2,6-diamineanthraquinone. Chemical structures of PAI obtained (Fig. 1) were confirmed by FTIR (Fig. 2) and NMR (Fig. 3) methods and by elemental analysis. Polyamideimides studied showed high thermal stability both in nitrogen or air atmosphere as well as high glass transition temperature in the range 220-265°C (Table 1). An evaluation of optical and photoluminescent properties of PAI in NMP solutions (Fig. 4 and 5) showed that they emit the light of wavelength in the range 405-572nm, dependently on the structure.
Key words: aromatic polyamideimides, synthesis, chemical structure, thermal stability, photoluminescence
New aromatic polyamideimides - syntheses and thermal and photoluminescent properties