ES/CEP共混树脂紫外光固化行为及性能研究

以有机硅环氧树脂为增韧剂改性脂环族环氧树脂,研究了树脂组分比、固化时间、引发剂种类和含量等工艺参数对固化行为的影响;采用热失重(TG)和差示扫描量热(DSC)对固化产物进行了分析.结果表明:当引发剂820和T含量为2％、环氧树脂(CEP)与有机硅树脂(ES)比例为85∶15时,1 000W高压汞灯紫外光固化15 min,树脂体系可以达到较好的固化效果.与纯环氧树脂相比,添加15％含量ES的共混树脂的抗拉强度略有下降而韧性得到较大提高,玻璃化转变温度下降7.5℃,快速失重区热降解速率明显下降.

Study on UV Curing Behavior and Properties of ES/CEP Resin

The effect of process parameters,including epoxy resin composition,curing time,initiator types and levels on curing behavior were studied by taking organic silicone as toughening agent to modified epoxy resin.Curing product was analyzed by TG and DSC.The results showed that when the content of initiator 820 and T were 2％,the ratio of epoxy resin and silicone resin was 85∶15,resin system could achieve good solidification effect under the high pressure mercury lamp with 15 minutes UV curing.The tensile strength of blending resin with 15％ organic silicon resin slight declines while toughness improved obviously compared with pure epoxy resin.At the same time,glass transition temperature decreased 7.5 ℃ and thermal degradation rate significantly decreased in rapid floating zone.