Yu Zhouhui, Cui Aiyong, Zhao Peizhong, Wei Huakai, Hu Fangyou
Department of Aeronautical and Mechanical Engineering, Naval Academy of Aeronautical Engineering, Qingdao, China.
J Appl Biomater Funct Mater. 2018 Jan;16(1_suppl):170-176. doi: 10.1177/2280800017753053.
Modified epoxy suitable for ultraviolet (UV) curing is prepared by using organic silicon toughening. The curing kinetics of the composite are studied by dielectric analysis (DEA), and the two-phase compatibility of the composite is studied by scanning electron microscopy (SEM).
The tensile properties, heat resistance, and humidity resistance of the cured product are explored by changing the composition ratio of the silicone and the epoxy resin.
SEM of silicone/epoxy resin shows that the degree of cross-linking of the composites decreases with an increase of silicone resin content. Differential thermal analysis indicates that the glass transition temperature and the thermal stability of the composites decrease gradually with an increase of silicone resin content. The thermal degradation rate in the high temperature region, however, first decreases and then increases. In general, after adding just 10%-15% of the silicone resin and exposing to light for 15 min, the composite can still achieve a better curing effect.
Under such conditions, the heat resistance of the cured product decreases a little. The tensile strength is kept constant so that elongation at breakage is apparently improved. The change rate after immersion in distilled water at 60°C for seven days is small, which shows excellent humidity resistance.
采用有机硅增韧制备适用于紫外线（UV）固化的改性环氧树脂。通过介电分析（DEA）研究该复合材料的固化动力学，并通过扫描电子显微镜（SEM）研究复合材料的两相相容性。
通过改变有机硅与环氧树脂的组成比例，探究固化产物的拉伸性能、耐热性和耐湿性。
有机硅/环氧树脂的SEM表明，复合材料的交联程度随着有机硅树脂含量的增加而降低。差示热分析表明，复合材料的玻璃化转变温度和热稳定性随着有机硅树脂含量的增加而逐渐降低。然而，高温区域的热降解速率先降低后增加。一般来说，仅添加10%-15%的有机硅树脂并光照15分钟后，复合材料仍能获得较好的固化效果。
在此条件下，固化产物的耐热性略有下降。拉伸强度保持不变，断裂伸长率明显提高。在60°C蒸馏水中浸泡7天后的变化率较小，显示出优异的耐湿性。
