论文部分内容阅读
用FTIR跟踪监测环氧丙烯酸酯胶粘剂光固化过程并研究了光引发剂体系中辐射时间与双键转化率的关系。研究结果显示,合理配合使用不同特征吸收波长的光引发剂,能有效利用紫外光源,提高固化速度。夺氢型光引发剂的引发活性低于断裂型光引发剂,断裂型光引发剂中α-羟基酮衍生物(1173)比α-胺基酮衍生物(907)和酰基膦氧化物(TPO)引发效率低。在α-羟基酮衍生物中185的引发活性又远远高于1173与184。复合型光引发体系和光引发剂与助引发剂联用的引发效率明显高于单一引发剂体系。
FTIR was used to monitor the photocuring process of epoxy acrylate adhesive and the relationship between the irradiation time and the double bond conversion in photoinitiator system was investigated. The results show that the rational use of different characteristics of the absorption wavelength of the photoinitiator, can effectively use UV light source to improve the curing speed. The hydrogen abstraction photoinitiator has a lower priming activity than the cleaving photoinitiator, and the α-hydroxyketone derivative (1173) in the cleavable photoinitiator is more stable than the α-aminoketone derivative (907) and the acylphosphine oxide Initiation efficiency is low. The priming activity of 185 in α-hydroxyketone derivatives is much higher than that of 1173 and 184, respectively. The initiating efficiency of compound photoinitiator system and photoinitiator and co-initiator was significantly higher than that of single initiator system.