【摘要】 用FTIR研究了不同活性的扩链剂对TDI封端PPG预聚物固化速度和反应动力学的影响.结果表明:3种扩链剂与TDI封端PPG预聚物固化反应速度分别按1,3丁二醇、1,4丁二醇、MOCA的顺序增加,室温下3种扩链剂在固化前期均遵循二级反应动力学规律,其固化反应为二级反应,因此不同活性的扩链剂不影响TDI封端PPG预聚物固化反应的反应级数.更多还原

【Abstract】 The influence of chain extenders on the reaction rate of polyether\|urethane prepolymers and its kinetics has been studied using FTIR. The results show that the reaction rate of MOCA is faster than that of 1,4 Butandiol, and the reaction rate of 1,4 Butandiol is faster than that of 1,3 Butandiol. Their reactions correspond to an nth\|order kinetic model with n=2.Different kinds of chain extenders show the same reaction order.更多还原