Mechanical, thermal and electrical properties of polyimides containing 1, 2, 3-triazole ring prepared by click reaction

摘要: 4-Aminophenyl propargyl ether (APPE) containing alkynyl group and diazide monomers were synthesized for the click reaction. 1, 2, 3-triazole-containing diamine by 1, 3-dipolar cycloaddition reaction in presence of Cu (I) catalyst which was used to prepare a novel polyimide 3-triazole ring (polytriazoleimide) polycondensation with aromatic dianhydride. The chemical structure polymers confirmed FT-IR, 1H-NMR 13C-NMR spectral techniques. Polytriazoleimides exhibit low dielectric constant 2.74–3.12 at 1 MHz, high thermal stability, temperature corresponding 5 % weight loss from (441–473 °C) good flame retardancy (LOI value 35.6–38.8). Glass transition observed be between 218 248 °C storage modulus 2.61 3.54 GPa. These are readily soluble highly polar organic solvents. Furthermore, incorporation significantly improves glass temperature, stability polymer. Hence coupling is an effective approach develop structural functional polyimides.