丙烯酸酯单体紫外固化机理初探

Studies on UV-Curing Mechanism of Acrylate Monomer

本文选用了二缩三乙二醇双甲基丙烯酸酯为单体，安息香、安息香甲（乙、异丙）醚、二苯甲酮、α－羟甲基安息香甲醚、联苯酰二甲基缩酮，加入三乙胺和Ｎ，Ｎ－二甲基对甲苯胺等叔胺，在紫外光照射下聚合交联，以红外光谱定量跟踪反应进行程度．实验结果表明．在单体中加入光引发剂后，紫外光照射时，聚合固化反应迅速进行，照射５分钟后反应程度达８６％～５０％，以安息香异丙醚得到的反应程度较高．加入叔胺后，降低了初始反应速度，但使最终反应程度显著提高．

In this paper,the crosslinking polymerization of triethylene glycol diactylate, under a UV lamp, initiated by pLOtoinitiator, such as, benzoin, benzoiu metlyl (ethyl, iso-propyl ) ether,a-hydroxylmetbyl benzoin methyl ether, was detected quantitatively by IR spectrometry. Tee results show that the polymerization catried out very rapidly under the UV lamp. The double bonds in the system teacted 86-50% after 5 minutes exposed to UV ray.The maximum pereentage was cotton in the system with initiator of benzoin iso-propyl ether. The addition of tertiary amines decreased the initial reaction rate. bul made the ultimate teaction percentages higher.