Synthesis and properties of novel polytriazoleimides derived from 1,2,3-triazole-containing diamines and aromatic dianhydrides

A new kind of 1,2,3-triazole-containing aromatic diamines were synthesized by the Cu(I)-catalyzed 1,3-dipolar cycloaddition reaction. These diamines were employed to synthesize a series of novel polytriazoleimides (PTAIs) by polycondensation with various aromatic dianhydrides in N,N-dimethylacetamide?(DMAc) via the conventional two-step method. The obtained polyimides were characterized by Fourier transform infrared, hydrogen-1 nuclear magnetic resonance, X-ray diffraction, differential scanning calorimetry, and thermogravimetric analysis techniques. The results show that the PTAIs are soluble in most of strong polar solvents and have inherent viscosity values of 0.470.68?dl/g (DMAc). PTAI films have tensile strengths of 60.6102.6?MPa and elongations at breakage of 3.04.1%, glass transition temperatures (Tg) of 208262 degrees C, and decomposition temperatures (at 5% weight loss) of 368401 degrees C in N2 atmosphere, which depend on the structure of the polymers. The PTAIs also exhibit good adhesion to copper and gas separation properties. Copyright (c) 2011 John Wiley & Sons, Ltd.