端丙炔基聚丁二烯预聚物的贮存稳定性

Study on the Storage Stability of Propargyl-Terminated Polybutadiene Prepolymer

为确定端丙炔基聚丁二烯(PTPB)在常温下的贮存稳定性,通过跟踪测试研究了PTPB在室温(15~30℃)、5℃他-10℃下的贮存稳定性。采用13 C-NMR、FT-IR、TG、GPC和黏度测试对贮存在不同温度下、不同时间的PTPB的化学结构和性质进行了表征分析,并将贮存的PTPB预聚物分别与聚叠氮缩水甘油醚(GAP)制成PTPB弹性体,采用FTIR、DMA和力学测试对弹性体进行表征。结果表明,在室温下贮存4个月的PTPB,与在5℃和-10℃贮存4个月的PTPB化学结构及性质一致,未发生聚合、交联、断链、氧化反应,黏度也未发生变化;由其制成的PTPB弹性体在3种温度下贮存4个月后,其分子结构、动态力学性能及室温力学性能也保持一致。因此PTPB能够在常温下稳定贮存,不需在低温贮存。

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 13 C-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.