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以二苯醚与苯甲酰氯为原料,合成了一种新型的激光光敏刺——4-苯氧基二苯甲酮(PBZP)。它能有效地吸收氮分子激光,从而引发环氧-丙烯酸酯树脂的快速交联聚合反应。用质谱与红外光谱对产物作了鉴定,其性能与常用的紫外光敏剂苯偶姻乙醚(BEE)及二笨甲酮(BZP)进行了比较。文中还分析了合成产物的紫外吸收特性和作用机理,并对聚合反应动力学作了探讨。结果表明,PBZP体系在空气中的聚合反应速率达10~6mol/L·s,量子效率为3.5mol/E,优于BEE与BZP,且比使用连续紫外光源所得反应速率大4个数量级。
A new type of laser photosensitive thorn, 4-phenoxybenzophenone (PBZP), was synthesized from diphenyl ether and benzoyl chloride. It efficiently absorbs nitrogen molecular lasers and initiates rapid cross-linking polymerization of epoxy-acrylate resins. The products were identified by mass spectrometry and infrared spectroscopy, and their properties were compared with the commonly used benzoin ether (BEE) and dibenzophenone (BZP). The UV absorption characteristics and mechanism of the synthesized products were also analyzed, and the polymerization kinetics was also discussed. The results showed that the polymerization rate of PBZP system in air was 10 ~ 6mol / L · s, the quantum efficiency was 3.5mol / E, which was better than that of BEE and BZP. The reaction rate was 4 orders of magnitude higher than that of continuous UV light source.