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Synthesis, characterization, and properties of novel polyamides containing triaryl imidazole moiety

Mousa Ghaemy, Nasim Movagharnezhad

A series of novel polyamides containing triaryl imidazole pendent group was successfully synthesized by direct polycondensation of a new diamine monomer, N-(4-(4-(4,5-diphenyl-1H-imidazole-2-yl)phenoxy)phenyl)-3,5- diaminobenzamide (DIDA),with various aromatic and aliphatic dicarboxylic diacids. These polyamides were characterized by elemental analysis, FT-IR and 1H NMR spectroscopy techniques, and their physical properties such as solubility, viscosity, and thermal properties bymeans of differential scanning calorimetry (DSC), dynamicmechanical thermal analysis (DMTA), and thermogravimetric analysis (TGA)were investigated. These polyamideswith inherent viscosities of 0.37 to 0.51 dL/gwere readily soluble inmany organic solvents and gave tough and flexible films by solution casting. These polyamides exhibited glass transition temperatures (Tgs) between 194 and 296ï‚°C, and their initial decomposition temperature varied from250 to 380ï‚°Cand for a totalweight loss of 10%(T10) from360ï‚°C to 510ï‚°Cin nitrogen.