摘要： 采用光差扫描量热法考察了环氧丙烯酸酯的光固化动力学行为。实验结果表明, 增加光引发剂和活性单体的浓度的都可以使反应的转化率有明显的提升, 当光引发剂的质量分数从 2% 增加到 5% , 转化率由 76.2% 上升至88.3% ; 当活性单体质量分数从 15% 增加到 25% , 转化率由 73.8% 上升至 95.3% , 但单体质量分数的提高对反应速率的变化不是很明显。此外, 光固化反应速率对光强非常敏感, 而氧气对丙烯酸酯光固化体系的阻聚作用较弱。

关键词: 环氧丙烯酸酯, 感光树脂, 光差扫描量热法, 紫外光固化, 动力学

Abstract: The photocuring process of epoxyacry lateresin was studied by differentialphoto- calorimetric(DPC)method in this paper.Experimental results showed that the conversion is increased sharply with the raising of either photoinitiator concentration ormonomer concentration. For example,when the photo initiatorconcentration is increased from 2% to 5% ,the conversion from 76.2% to 88.3%.While themonomer concentration is increased from 15% to 25%, the conversion from 73.8% to 95.3%.But the conversion rate increases slowly with the raising of monomer concentration. In addition,The photocuring process is sensitive to th eUV light intensity. Butthe inhibition of the oxygen on photocuring process is weak

Key words: epoxy acrylate resin, pho tosensitive resin, d ifferen tial photocalorimetry, UV curing, k inetics