原子氧环境下磁力矩器用聚合物材料的质损和红外光谱分析

文章利用新型的原子氧环境模拟设备进行真空和原子氧试验,通过质量损失测量和FT-IR分析,对试样的质量损失率(SAML)和表面成分的变化进行了研究。试验结果表明:真空环境会导致材料产生质量损失,4种材料中真空质损最大相差24倍;原子氧作用导致聚合物材料产生质量损失,4种材料中质量损失率最大相差25倍;原子氧与有机硅物质反应能够形成保护层,可以抑制原子氧对材料内部的进一步侵蚀。FT-IR分析结果表明,原子氧作用导致环氧材料的-N消失,O元素百分比含量升高,硅橡胶的化学键被破坏,并导致新的O-H和C-H的生成。

FT-IR and mass loss analysis of polymer materials in magnetic torquer after atomic oxygen exposure

A new kind of atomic oxygen simulator is used to test materials used in the magnetic torquer in this paper. Mass loss measurement and FT-IR analysis are used to obtain SAML and surface composition change of samples. Results indicate that vacuum exposure will lead to mass loss of materials,but the extent of loss for four tested materials sees a huge difference up to twenty four times. As for the mass loss after atomic oxygen exposure,the difference of the extent reaches twenty five times. Silicone can react with atomic oxygen to form a protective coating for preventing more atomic oxygen erosion. FT-IR analysis indicates that nitrogen group disappears on the surface of epoxy after atomic oxygen exposure,and O content increases. For silicone,the chemical bonds are broken and are turned into new kinds of O-H and C-H bonds.