摘要
对环氧树脂、醇酸树脂、聚氨酯及有机硅树脂防护涂层在真空紫外线作用下的表面层变化进行了研究。发现在所采用的氘灯真空紫外光源的作用下,环氧树脂、醇酸树脂、聚氨酯质损较大,且表面出现“暗化”现象;有机硅树脂质损相对较小,在连续辐照过程中涂层表面颜色不发生改变,抗紫外老化能力强。光电子能谱(XPS)、红外光谱(FTIR)对试验前后样品进行表征研究,探索真空紫外效应的影响规律,对真空紫外与涂层的反应机理也做了相应的分析:结构不同的有机涂层对真空紫外(VUV)的敏感程度不同,含环氧环、C-N和支链的有机涂层,最易受到VUV破坏而裂解;Si-O、苯环、C=O,在VUV辐照环境下相对稳定。
For the protected polymers in aerospace, the surface change of organic protective coatings in the vacuum ultraviolet radiation was investigated. The results show that VUV irradiation makes organic coatings produce mass loss, whose amount is in large quantity at initial stage and does not almost increase again as the extension of exposure. It is obviously that color of organic coatings except Siloxane have great change. So Siloxane is better in resistance to photoaging than the others, VUV irradiation can case scission of various chemical bonds in polymers, for example, C-N, Si-CH3, C-C, epoxy ring, but others such as SI-O, benzene ring, C-O are relatively stable under the environment of VUV irradiation.
出处
《中国空间科学技术》
EI
CSCD
北大核心
2007年第1期33-40,共8页
Chinese Space Science and Technology
关键词
真空紫外辐射
有机涂层
降解
航天器
Vacuum ultraviolet radiation Organic coating Degradation Spacecraft
