端丙炔基聚丁二烯预聚物的贮存稳定性

In order to determine the storage stability of propargyl-terminated polybutadiene (PTPB) at room temperature, the storage stability of PTPB at room temperature(15-30℃), 5℃ and -10℃ was investigated by tracking test. The chemical structures and properties of PTPB stored at different temperatures and times were characterized by ¹³C-NMR, FTIR, TG, GPC and viscosity tests. The PTPB elastomers were prepared from the stored PTPB prepolymer and azido-glycidyl ether (GAP) and the properties of elastomers were characterized by FT-IR, DMA and mechanical tests. The results show that the PTPB stored at room temperature for four months has the same chemical structure and properties as that of PTPB stored at 5℃ and -10℃, no polymerization, cross-linking, oxidation and other reactions have taken place, and the viscosity has not changed. After storing for four months under three different temperatures, the molecular structure, dynamic mechanics performance, mechanics performance at room temperature of PTPB elastomers made from stored PTPB are also consistent. Therefore, PTPB can be stored stably at room temperature.