摘要
目的 研究各种动力学因素对同步互穿网络 ( SIN)形成的影响 .方法 用傅里叶红外光谱法 ( FTIR)跟踪聚氨酯 ( PU)中 NCO基团及甲基丙烯酸缩水甘油酯 ( GMA)中C C基团特征吸收峰的变化 ,分别得到其转化率与时间曲线 .结果与结论 研究了互穿网络中各组分与纯组分反应情况的差异 ;SIN中 PU和 PGMA反应均为二级动力学反应 ,其反应活化能分别为 2 8.1和 3 5 .6k J/ mol;当改变 PU催化剂时 ,根据红外跟踪得到转化率曲线 。
Aim To study the effect of various kinetic factors on the formation of simultaneous interpenetrating network(SIN). Methods The consuming of NCO group of PU and CC group of GMA was monitored through FTIR to obtain the conversion rate vs. time curves. Results and Conclusion The difference between the reaction situations of the respective component in SIN and the pure respective component was investigated. The PU and PGMA reactions in plasticized SIN all follow the second order kinetic mechanism and their activation energies are 28 1 and 35 6 kJ/mol respectively. As the PU catalyst was changed, the different gelation sequences are determined according to the conversion rate curve obtained through FTIR and the relation between conversion rate and gelation point.
出处
《北京理工大学学报》
EI
CAS
CSCD
1999年第6期769-773,共5页
Transactions of Beijing Institute of Technology
基金
国家"8 6 3"计划项目! ( 86 3 -715 -0 11-0 0 90 )
关键词
聚氨酯
互穿聚合物网络
PGMA
固化反应
动力学
polyurethane(PU)
interpenetrating polymer network
poly(glycidyl methacrylate)(PGMA)
kinetics
FTIR
