Microwave-Accelerated Synthesis of Nanostructured Poly(amide-imide)s Containing Benzimidazole Group in a Medium Consisting of Molten Salt Ionic Liquid

Microwave heating indicates a main infiltrate in preparation chemistry as it can be considered knowingly well-organized than conventional heating methods. In current polymerscience, the usage of microwave-assisted polymer preparation has been widely explored [1-3]. The aim of this paper was togain extra intuition into synthesis of the nanostructured poly(amide-imide)s via microwave irradiation. Materials and methods The PAIs were synthesized by condensation reaction of 5-(2-benzimidazole)-1,3-phenylenediamine, with N-trimellitylimido- L-amino acids in molten tetrabutylammonium bromide (TBAB) in the presence of triphenyl phosphite (TPP). The reaction mixture was irradiated in a microwave oven for 3 minat 100% of its power level. The resulting products were isolated by the addition of 30 mL of methanol. The obtained polymers were characterized by Fourier transform infraredspectroscopy, specific rotation, powder X-ray diffraction, field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), elemental analysis, and 1H-NMR technique.