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

Abstract

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 0.47-0.68dl/g (DMAc). PTAI films have tensile strengths of 60.6-102.6MPa and elongations at breakage of 3.0-4.1%, glass transition temperatures (T g) of 208-262°C, and decomposition temperatures (at 5% weight loss) of 368-401°C in N 2 atmosphere, which depend on the structure of the polymers. The PTAIs also exhibit good adhesion to copper and gas separation properties. © 2011 John Wiley & Sons, Ltd.