光敏性有机硅丙烯酸酯的合成及其改性紫外光固化材料研究  

Synthesis of photosensitive silicone acrylate and its influence on the properties of UV-curable materials

作　　者：杜现礼[1] 刘长利[1] 胡碧茹[1] 吴文健[1] 

机构地区：[1]国防科技大学航天与材料工程学院,长沙410073

出　　处：《化工新型材料》2009年第3期66-68,96,共4页New Chemical Materials

基　　金：国家"863"计划项目(2007AA809310D)

摘　　要：以Karstedt催化剂,催化端氢硅油(DHPS)和三缩丙二醇二丙烯酸酯(TPGDA)的硅氢加成反应,合成光敏性有机硅丙烯酸酯(SA)。反应产物用红外光谱和紫外-可见光谱进行了表征,将不同比例的有机硅丙烯酸酯作为活性稀释剂添加到光固化体系中,考察了配方分别在空气和N2中的光固化性能,利用扫描电镜观察了光固化膜的表面形貌,研究了SA对光固化材料机械性能、热稳定性以及化学稳定性的影响。结果表明,氧阻聚作用对于SA配方比较明显,能显著降低其固化速率;SA对光固化膜物理化学性能有一定影响,含有5%SA的光固化材料综合性能优异,超过此含量,光固化材料机械和化学稳定性随着SA含量的增加反而降低;热重分析表明,SA能提高体系的热稳定性。A novel UV-curable silicone with acrylate end groups was prepared via the direct hydrosilylation of α,ω- dihydrogenpolysiloxane and tripropylene glycol diacrylate （TPGDA） using Karstedt catalyst. The molecular structures of reacting products were characterized by FTIR and UV-Vis spectroscopy. Silicone acrylate with different ratio by weight was added in UV-curable coating formulations as reactive diluents. UV-curing behaviors of the formulations under different atmospheres of air and nitrigen were also investigated. Scanning electron micrograph was used to observe the surface of UV-cured films. Mechanical, thermal and chemical properties of the UV-cured films were investigated. The results showed that SA containing coating formulations were very sensitive to oxygen inhibition, and the addition of SA caused a dramatic change of the properties of UV-cured films. The increase of SA content resulted in a decrease in mechanical and chemical properties when the ratio was beyond 5 % by weight. Thermogravimetric analysis revealed that UV-cured films exhibited good thermostability.

关 键 词：有机硅 光敏性 紫外光固化 

分 类 号：O634.41[理学—高分子化学]