New photosensitive poly(amid-imide)s containing chalcone moiety and hydantoin derivatives in the main chain: Synthesis and characterization

Six new poly(amid-imide)s containing chalchone and hydantoin moieties in the main chain were synthesized through the polycondensation reaction of 1,3-bis[4,4'-bis(trimellityimido)phenyl]-2-propenone 6 with six hydantoin derivatives 7a-f in a medium consisting of triphenyl phosphite, calcium chloride, pyridine, and N-methyl-2-pyrrolidone. The polycondensation reaction produced a series of novel poly(amid-imide)s 8a-f in high yields with inherent viscosities between 0.26 and 0.42 dL/g. The resulting polymers were characterized by elemental analysis, viscosity measurements, solubility test, thermo gravimetric analysis (TGA and DTG), FTIR, and UV-Vis spectroscopy. 1,3-bis[4,4'-bis(trimellityimido)phenyl]-2-propenone 6 was prepared from a three-step reaction by using 4-nitro benzaldehyde 1 and 4-nitro acetophenone 2 as precursors.