含有芝麻酚-二苯甲酮结构光引发剂的合成及应用

Synthesis and Characterization of One-component Photoinitiator Based on BP and Sesamol

本文合成了一种单组份的夺氢型自由基光引发剂5-(4’-苯甲酰苯基)氧基)-1,3-苯并二氧戊烷(BPBDO),通过1H、13C及MS表征并确定了其化学结构;通过ESR、LFP实验研究了BPBDO的光引发机理;通过甲基丙烯酸甲酯的聚合反应研究了BPBDO引发单体进行光聚合性质。最终结果显示BPBDO的引发过程是通过自身夺氢-供氢过程,能够产生活性自由基,并引发单体聚合,其引发活性比BP/BDO引发体系更高,并且在整个使用过程中可以减少甚至不需加入叔胺助引发剂。

A novel photoinitiator, 5- （4＇-benzoyl-phenyloxyl）-1,3-benzodioxol, used in free radical poly- merization, is synthesized. The structure is characterized by 1^H NMR, 13C NMR and MS. The photo induced process is monitored by ESR and LFP. Its capability to act as an initiator for the polymerization of methyl methacrylate （MMA） is also examined. The results show that BPBDO is an effective photoinitiator, and its photo activity is higher than that of BP/BDO. It is also inferred that this photoinitiator could initiate polymerization in the absence of amine.