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采用配有水平样品台的实时红外光谱仪(RT-FT-IR)监测三芳基硫金翁盐(UVI-6976和UVI-6992)紫外光引发双酚A型环氧单体(JY-257)光聚合动力学过程,结果表明:配有水平样品台的红外检测动力学得到的数据重现性好;当引发剂UVI-6992的质量分数从0.8%增加到2.3%时,JY-257转化率和聚合速率迅速增加,继续增加引发剂质量分数到5.1%,转化率增加幅度明显减小,且最大聚合速率开始降低;对比两种三芳基硫金翁盐的光引发活性发现,引发剂浓度较低时,UVI-6976的引发活性远远高于UVI-6992;但是当引发剂浓度较高时,二者的引发活性相近;两种引发体系得到的聚合物体积收缩均较低。
Bisphenol A-type epoxy monomer (JY-257) light was initiated by UV-IR spectroscopy (RT-FT-IR) with a horizontal sample stage The results showed that the data obtained by infrared detection kinetics with horizontal sample stage had good reproducibility. When the mass fraction of initiator UVI-6992 increased from 0.8% to 2.3%, the conversion of JY-257 and The polymerization rate increased rapidly, and the mass fraction of initiator increased to 5.1%, the increase rate of conversion rate decreased obviously, and the maximum polymerization rate began to decrease. Compared with the photoinitiation activity of the two triarylthiogonium salts, the initiator concentration was lower , UVI-6976 has much higher priming activity than UVI-6992; however, the priming activity of UVI-6976 is similar when the initiator concentration is high, and the volume shrinkage of the two initiating systems is low.