| Effect of Space Radiation on Properties of MPVQ compound |
| Received:October 18, 2023 Revised:October 18, 2023 |
| DOI：10.12136/j.issn.1000-890X.2024.08.0577 |
| Key Words: MPVQ；space radiation；tensile strength；tear strength |
| Author Name | Affiliation | E-mail | | wangpeng* | Beijing Spacecrafts Manufacture Co.,Ltd | 517796944@qq.com |
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| Abstract: |
| Effect of space radiation on the properties of methylphenyl vinyl silicone rubber （MPVQ） was studied.The results showed that with the increase of irradiation dose，the appearance color of MPVQ compound presented a change trend of white-light yellow-gray yellow，the hardness increased，and the tensile strength and tear strength curves presented an S shape.When the radiation dose was 1×106
Gy（Si），the tensile strength，elongation at break and tear strength of MPVQ compound decreased sharply by 20%，89% and 69% respectively. When the radiation dose was greater than 1×106 Gy（Si），the tensile strength and tear strength of MPVQ compound rebounded to a certain extent.As the radiation dose further increased，the tensile strength and tear strength of MPVQ compound falled back.The elongation at break always showed a downward trend.MPVQ products basically met the 15 year operational life requirment of static operation spacecraft，but in the end the elasticity and load-bearing capacity of MPVQ products were basically lost，they were prone to fragmentation under external forces.MPVQ products were not suitable for use in long-life spacecraft dynamic mechanisms exposed to space environments. |
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