2－烷基蒽醌引发环氧丙烯酸酯光固化行为的研究

PHOTOCURING BEHAVIOUS OF EPOXY ACRYLATES INDUCED BY 2-ALKYL ANTHRAQUINONES

研究了在没有其它活化剂存在条件下，采用２－烷基蒽醌直接引发环氧丙烯酸酯体系的光交联反应。应用光谱方法和重量法测定了反应体系在光固化过程中双键含量、光交联密度、凝胶转化率和固化膜硬度的变化情况。实验结果表明，２－烷基蒽醌直接引发环氧丙烯酸酯类的光固化反应，具有很好的引发效率，可以和安息香双甲醚与流杂蒽酮等光引发剂相比拟，并具有价格便宜、光固化可在空气条件下操作等优点，另外对反应体系的引发剂浓度、组分配比的影响以及对不同类型环氧丙烯酸酯反应体系的引发效果均进行了讨论。

The photochemical erossilinking of epoxy acrylates directly initiatedby 2--alkyl anthraquinones (AQ) in the absence of activators was studied inthis paper. The changes of double bond content, photocrosslinlting density, gel conyersion and hardness of cured film in the ptotocuring process were monitored byphotospectrometry and gravimetry. The experimental results show that the 2--alkylAQ exhibits a high initiation efficiency which is comparable with dimethoxy--2phenyl acctophenone and thioxanthone photoinitiators. Moreover AQ is very cheapand its photocuring can be operated in the air condition. The effects of initiatorconcentration. proportion of components and initiation efficiencies for different kindsof epoxy acrylates were also discussed