真空紫外辐照对加成型硅橡胶光学性能的影响

Behaviors of Addition Type Silicone Rubber in Space Ultraviolet Enviorment Simulates

考察了加成型硅橡胶在真空环境中经 10 0 0ESH紫外辐照后的性能变化。结果表明 ,辐照后材料均出现发黄的现象 ,光学透过率大幅度下降 ,同时加入硅酸钾包覆后制备的热控涂层反射率下降。经原位测试与离位测试 ,发现加成型硅橡胶在两种不同条件下测得的结果差异较小 ,而在有机硅橡胶中加入ZnO后原位与离位测试结果则差异明显 ,表现出明显的漂白作用。

Ultraviolet radiation is one of the most important factors which affect polymer materials in space environment. In present paper, the space ultraviolet environment is simulated in laboratory,. The property (solar absorptance, emittance, reactivity efficiency) of material exposed to a vacuum UV is tested. The reflectance are measured in situ during the radiation process.