Polyimide films might be damaged under space high energy particle irradiation. In this paper, the mechanical properties of polyimide film is studied with the60Co radiation source, the thermo-gravimetric analysis and the XPS analysis. Significant total dose effect and dose rate effects are found in the mechanical properties of the PI film under gamma ray radiation.%聚酰亚胺(PI)薄膜在空间高能粒子辐射环境下会发生力学性能退化.文章利用钴源辐照试验装置和热重分析、XPS分析等对均苯型PI薄膜在γ射线辐照下的力学性能退化及其规律进行研究,发现在γ射线辐照下,PI薄膜有明显的总剂量效应和剂量率效应.
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