Properties of New Polyimide Film for Spacecraft
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摘要: 原子氧是低地球轨道环境中对航天器影响较为严重的因素之一. 为了提高聚酰亚胺薄膜抗原子氧侵蚀的性能, 依据结构与性能的关系, 设计合成了新型的聚酰亚胺薄膜. 采用这种新型聚酰亚胺薄膜制备了二次表面镜, 利用地面模拟设备对热控涂层进行原子氧暴露试验, 结果表明其具有优异的耐原子氧侵蚀性能. 此外, 真空elax-elax紫外、真空elax-elax质子、真空elax-elax电子辐照等空间环境模拟试验表明, 这种耐原子氧聚酰亚胺薄膜二次表面镜热控涂层具有良好的空间稳定性.Abstract: Atomic oxygen is one of the hazard factors for spacecraft in Low Earth Orbit (LEO). Atomic oxygen interacts with thermal control coatings. The interaction is very aggressive toward coatings properties, especially their thermo-optical properties which are the most important for spacecraft thermal control. Depending on the relationship of conformation and performance, new polyimide film was synthesized to improve the atomic oxygen resistance. The results of atomic oxygen with ground simulation test indicate that the second surface mirrors thermal control coating made by the new polyimide film has better atomic oxygen resistance properties than the coating being in use. Environmental adaptability tests such as ultraviolet irradiation test, proton irradiation test, electron irradiation test were made also. The test results show that the second surface mirrors thermal control coating has very good performance.
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Key words:
- Atomic oxygen /
- Polyimide /
- Thermal control coatings /
- Spacecraft /
- Irradiation test
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