KCD/MDEA/TA三元引发剂引发丙烯酸酯/液晶复合体系光聚合动力学

摘要

The photopolymerization kinetics of acrylate/liquid crystal(LC) mixtures photoinitiated by 3,3'-carbonyl bis ( 7-diethylaminocoumarin) ( KCD )/N-methyl-N, N-diethanolamine ( MDEA )/2-( 4-methoxy-phe-nyl)-4,6-bis(trichloromethyl)-l ,3,5-triazine(TA) was studied by photo-differential scanning calorimetry equipped with 441. 6 nm filters. The results indicate that adding TA into KCD/MDEA binary photoinitiator greatly increases the maximum rate of photopolymerization Rp(max) and monomer conversion.Rp(max) and the total monomer conversion increase respectively by 100% and 69% as the content of TA is 0. 5% (mass fraction). Moreover, both Rp(raM) and total monomer conversion increase by 2.5 and 2.8 times separately when the light intensity rises from 1. 5 Mw/cm2 to 35. 2 Mw/em2.%采用配有441.6 nm滤光片的光差示扫描量热仪研究了3,3′-羰基双(7-二乙胺香豆素)(KCD)/N-甲基二乙醇胺(MDEA)/2-(4-甲氧苯基)-4,6-双(三氯甲基)-1,3,5-三嗪(TA)三元引发剂引发丙烯酸酯/液晶复合体系光聚合动力学行为.结果表明,在KCD/MDEA复合引发剂中添加TA,显著提高了丙烯酸酯/液晶复合体系的最大光聚合速率[Rp(max)]和单体转化率,当TA质量分数为0.5％时,体系的Rp(max)和单体转化率分别提高了100％和69％.同时,随着光照强度的增加,该体系的Rp(max)和单体转化率呈增大的趋势,当光强从1.5 mW/cm2提高到35.2 mW/cm2时,其Rp(max)和最终单体转化率分别提高了2.5和2.8倍.