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本工作合成了一系列不同丙烯酸酯和丙烯酸组成的共聚物,其中丙烯酸单元含量在13～20％之间,然后使之与四基丙烯酸缩水甘油酯反应,形成带有甲基丙烯酸酯侧链的预聚体。用红外光谱法检测1640cm~(-1)处双键峰的变化,测定了体系的光交联速度。结果表明,光交联过程及固化膜中剩余双键含量与预聚体的性质及交联剂官能团的性能有关。预聚体与交联剂官能团量的比例,对固化速度有明显影响。以等摩尔比反应时,速度最快。不同光敏剂的引发效率为苯乙酮衍生物>安息香醚类>芳香酮/胺。
This work synthesized a series of copolymers of different acrylates and acrylics with acrylic acid units in the range of 13-20% and then reacted with glycidyl tetraacrylate to form the Prepolymer. The change of double bond peak at 1640cm -1 was detected by infrared spectroscopy. The photocrosslinking speed of the system was measured. The results show that the photocrosslinking process and the content of the remaining double bond in the cured film are related to the properties of the prepolymer and the properties of the crosslinker functional groups. The ratio of prepolymer to crosslinker functional groups has a significant effect on the cure rate. When equimolar ratio reaction, the fastest. The initiation efficiencies of different photosensitizers were acetophenone derivatives> benzoin ethers> aromatic ketones / amines.