摘要： 混杂光固化体系是指在同一体系中采用两种或两种以上不同类型的聚合反应使体系固化的方法。本文 用光差扫描量热法考察了环氧丙烯酸酯在自由基 -阳离子混杂光固化体系中的光固化动力学行为。实验结果表明， 自由基 -阳离子混杂光固化体系结合了自由基和阳离子光聚合反应的优点，表现出较好的协同效应，如，混杂体系的 聚合反应进行到 150s时，转化率可达到 98.4%，而此时自由基体系的反应转化率只有 80.6%。此外通过研究混杂体 系的光固化动力学得到:光引发剂浓度指数 0.16，小于自由基体系的理论值 0.5，也小于阳离子体系的理论值 1;活性 单体浓度指数 1.61，介于自由基体系的理论值 1和阳离子体系的理论值 2之间。

关键词: 混杂光固化 , 环氧丙烯酸酯 , 光差扫描量热法 , 动力学

Abstract: Hybrid UV curing proces consists of two or more kinds of polymerization or cross-linking re- actions that take place in the same system，which is a novel approach to modify polyme rmaterials in-situ. The photo-curing proces of free radical-cationic hybrid epoxy acrylate resin system was monitored by dif-ferential photo-calorimetric (DPC) method.Experimental results showed that radical-cationic hybrid UV curing system，which combines the advantages of radical and cationic polymerization，gives a better synergy efect.For example，when the polymerization of hybrid system proceded to 150 s，the conversion rate reached 98.4%，while the conversion rate for radical system at the same time was only 80.6%.In addition， through research of kinetics of UV curing hybrid system，it was found that the initiator concentration index 0.16 was less than the theoretical value of the radical system0.5，also lower than the theoretical value of the cationic system1.Active monomer concentration index was 1.61，which was betwen theoretical value of the radical system of 1 and the cationic system of 2.

Key words: Hybrid UV curing, epoxy acrylate resin, diferential photocalorimetry, kinetics