环氧-丙烯酸酯混杂光固化体系的研究

研究环氧－丙烯酸酯混杂光固化体系中引发剂的协同作用，证实混杂光固化过程中自由基引发剂对阳离子引发剂二苯基碘Weng盐的增感作用，混杂光固化膜具有优良的机械性能，其抗冲击性能，抗弯曲性能及硬度优于单纯的阳离子体系固化膜，与自由基体系固化膜性能接近。混杂光固化膜的玻璃化转变温度高于自由基体系固化膜；它的耐溶剂性能优异，耐丙酮擦拭次数比自由基固化膜高25倍以上，比阳离子固化膜高3．5倍。这可能是由于混杂光固化过程中形成的IPN结构造成的，动态粘弹谱和扫描电镜的实验结果证实了这一结论。

Studies on Epoxy-acrylate Hybrid UV-cure System

We studied an epoxy|acrylate hybrid UV|cure system and demonstrated that the diaryliodonium salt can be sensitized by the free radical photo|initiators. The cured product of hybrid UV|cure system has better mechanical properties, such as hardness, bending strength, impact strength, etc., than those of the cationic product. The glass transition temperature (%T%-g) of hybrid| cured product is higher than that of the free|radical product. The solvent|resistance (double acetone rubs) of hybrid UV cured product is much higher than those of either free|radical product or cationic product. The excellent performance was attributed to the formation of interpenetrating polymer network (IPN), which was demonstrated by dynamic viscoelastic spectra and scanning electron microscope (SEM).