Abstract:The mechanical property and mechanism of polyimide film in proton radiation was studied by 椎800
combined space radiation test facility of Beijing Institute of Space Environment Engineering (BISSE) and X-ray Pho鄄
toelectron Spectroscopy(XPS). The following results can be obtained: the rupture elongation and tensile strength of
polyimide exponential decreases with the increase of proton radiation fluence, and its elastic modular keep steady.
The polyimide film has good thermal stability in proton radiation environment, but its transmittance in ultraviolet and
visible range decrease and has red shift effect. The breakage and cross linkage of molecular bond is the major cause of
decrease of polyimide爷s mechanical property in proton radiation environment.
