Abstract:As a new coating system, polytriazole coating (PTA) had many advantages such as low curing temperature, heat resistance and excellent anti-corrosion performance so on. But due to the presence of more rigid groups such as benzene rings and triazole rings in the structure, coating PTA had high brittleness, low impact resistance, poor adhesion and other disadvantages. With the continuous improvement of the coating performance standards, not only did the coating need to have good heat resistance and corrosion resistance, but also the coating had good mechanical properties. Therefore, starting from the molecular structure of the polytriazole coating, the third monomer dipropargyl bisphenol A (BPA) and bisphenol A bisazide (DGEBA-N3) respectively were synthesized and characterized by Fourier Transform-Infrared-spectroscopy (FT-IR) and Nuclear Magnetic Resonance Spectroscopy (1H-NMR). Then according to a certain ratio, BPA and DGEBA-N3 were added to adjust the properties of the polytriazole coatings, and synthesized the modified polytriazole coatings B-PTA and D-PTA. The curing process and thermal properties for the coatings B-PTA and D-PTA were studied by Differential scanning calorimetry (DSC), FT-IR, Dynamic mechanical thermal analyses (DMA) and Thermogravimetric analysis (TGA). Meanwhile, mechanical properties and anti-corrosion performance were investigated at 25℃. The results showed compared with coating PTA, the glass transition temperature (Tg) of the coatings B-PTA and D-PTA was reduced, the thermal stability (Td5) was basically unchanged. The shear strength, adhesion force, impact resistance and flexibility had all increased, the hardness was basically unchanged. Meanwhile, Corrosion resistance of the coating B-PTA was improved in salt spray box, 10% H2SO4 and 5% NaCl, and reduced in 10% NaOH; Corrosion resistance of the coating D-PTA was improved in salt spray box and chemicals medium.