Electron irradiation effects on the mechanical properties of polyethylene

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Liu, Yuming^1^2 ; Yang, Xiaoning^1^2 ; Zhao, Chunqing^1 ; Wang, Jinghu^1

Beijing Institute of Spacecraft Environment Engineering, Beijing

100084, China^1

Science and Technology on Reliability and Environment Engineering Laboratory, Beijing

100084, China^2

关键词: Common materials;    Degree of damages;    Electron energies;    Energy of electron;    Irradiation Damage;    Molecular structural;    Property degradation;    Space electrons;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/4/042169/pdf
DOI  :  10.1088/1755-1315/267/4/042169

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Studies on space electron radiation effect for evaluating property degradation of space materials are one of the important things for exposing the faults of the materials in orbit. Here the influence of electron flux and energy on the electron irradiation effect of polyethylene that is one of the common materials in spacecraft has been studied. Due to the analysis results of SEM and FTIR, it is proposed that the irradiation damage mechanism of the materials is independent of electron flux and electron energy. The molecular structural modifications and chemical changes of the materials have all occurred after each electron irradiation test. But the degree of damage on the mechanical properties of polyethylene during the electron irradiation test is dependent on electron energy. The mechanical properties of polyethylene will completely be lost after electron irradiation when the energy of electron is above 1 MeV, and the polyethylene will be broken down.