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| 60Co Radiation Effects on the Mechanical Properties of Heat-shrinkable Sleeves for Satellites |
| Received:March 01, 2016 Revised:August 15, 2016 |
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| DOI：10.7643/ issn.1672-9242.2016.04.029 |
| KeyWord:heat-shrinkable sleeve mechanical property irradiation γ rays |
| Author | Institution |
| ZHAO Chun-qing |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| LIU Yu-ming |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| NIE Xiang-yu |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| ZHANG Yong-tai |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| DING Yi-gang |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| SHEN Zi-cai |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
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| Abstract: |
| Objective To research the degradation of the mechanical properties (elongation at break and tensile strength) of heat-shrinkable sleeves for satellites in the spatial radiation environments. Methods The reason for the degradation of mechanical properties of the heat-shrinkable sleeves was analyzed in the simulated earth’s orbit particle radiation environment with γ rays radiated by 60Co through various means, such as surface topography analysis, radiolysis gas analysis and infrared spectrum analysis with X-ray photoelectron spectroscopy, etc. Results The result indicated that the color of the heat-shrinkable sleeves became darker after being radiated and there was obvious degradation of the mechanical properties. The elongation at break of the materials degraded from 414.3% to 0.06%, and the tensile strength degraded from 17.43 MPa to 2.15 MPa at the maximum radiation. The original mechanical properties of the heat-shrinkable sleeves were almost completely lost. Conclusion The main chain of heat-shrinkable sleeve is broken and volatile gases CO2 and CH4, etc. are generated, which causes the degradation of the mechanical properties. |
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