一种疏水型可聚合光引发剂的合成、表征及其应用

以2-羟基-4'-(2-羟乙氧基)-2-甲基苯丙酮与甲基丙烯酰氯为原料,通过Schotten-Baumann反应合成了一种疏水型可聚合紫外光引发剂2-(对2-羟基-2甲基苯丙酮)-甲基丙烯酸羟乙酯(HMEM)。对合成产物使用红外光谱、核磁共振谱和紫外-可见吸收光谱进行了分析和表征,证明甲基丙烯酰氯上的酰氯基团与2-羟基-4'-(2-羟乙氧基)-2-甲基苯丙酮上的伯羟基发生Schotten-Baumann反应生成酯基结构,从而制备了具有疏水性及光引发活性的新型光引发剂HMEM。随后将HMEM接枝到聚苯乙烯(PS)微球表面,并通过红外光谱和紫外-可见吸收光谱表征证明光引发剂以化学键合的方式存在于微球表面,从而使微球同时具有光引发活性和交联作用,完成了对微球表面的功能化构筑。

Synthesis, Characterization and Application of a Hydrophobic Polymerizable Photoinitiator

A hydrophobic polymerizable photoinitiator, 2-(access to 2-hydroxy-2-methyl propiophenone) - hydroxyethyl methacrylate (HMEM) was synthesized through Schotten-Baumann reaction, used 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone and methacryloyl chloride as raw materials. IR, NMR and UV - visible absorption spectroscopy were used to analysis and characterize it. Through these analysis tools, the existence of ester group was confirmed, it was formed from acyl chloride in methacryloyl chloride and hydroxide group in 2-Hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone. Then, HMEM was grafted onto the surface of polystyrene microspheres. Through IR and UV - visible absorption spectroscopy analysis, the photoinitiator was proved to be chemically bonded to the surface of the microspheres. And PS microsphere surface was functionalized with photoinitiate reactivity and crosslinking function.