质子辐照对宇航员航天服中使用的PTFE、KEVLAR、EFTE、DYNEEMA和NOMEX聚合物材料的影响的蒙特卡罗模拟

IF 1.7 4区 工程技术 Q4 POLYMER SCIENCE
Turgay Korkut , Hatun Korkut
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引用次数: 0

摘要

宇航员遭受着由高能质子、重离子和碰撞中产生的二次粒子产生的自然空间辐射。银河宇宙射线和太阳粒子事件是空间辐射光谱的基本组成部分。宇航员使用的服装和配饰设计旨在最大限度地减少这种环境的有害影响。高分子材料在宇航服中更受欢迎,因为它们重量轻、价格便宜、耐用。利用蒙特卡罗模拟工具strim -2013和FLUKA 2011.1将Teflon、KEVLAR、乙烯四氟乙烯、DYNEEMA和NOMEX聚合物航天员穿戴材料暴露在高能质子照射下。质子能量以1,2,3 GeV表示,按空间辐射大小排序。此外,还进行了单原子位移的计算,并从结构变化的角度对结果进行了讨论。与能量为1、2和3 GeV的质子相互作用后,5种材料中原子位移值最低的材料是DYNEEMA,分别为1.01E−25、9.96E−26和1.00E−25。同样,在这三种质子能所研究的材料中,DYNEEMA的电子停止功率值最高,分别为2.11E−03、2.10E−03和2.31E−03。DYNEEMA的核停止功率最高,分别为2.23E−07、1.53E−07和4.27E−07。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Monte Carlo simulations of proton irradiation effects on PTFE, KEVLAR, EFTE, DYNEEMA, and NOMEX polymeric materials used in astronaut space suits

Astronauts suffer from natural space radiation as high-energetic protons, heavy ions, and secondary particles produced in collisions. Galactic cosmic rays and solar particle events are the basic parts of space radiation spectra. Wears and accessories designs for use by astronauts aim to minimize these deleterious effects of this environment. Polymeric materials are preferred in astronaut suits because they are lightweight, inexpensive, and durable. Teflon, KEVLAR, ethylene tetrafluoroethylene, DYNEEMA, and NOMEX polymeric astronaut wear materials were exposed to high energetic proton irradiations by the use of Monte Carlo simulation tools SRIM-2013 and FLUKA 2011.1. Proton energies are applied as 1, 2, and 3 GeV known as in order of space radiation magnitude. Besides, displacement per atom calculations were done and results were discussed in the plane of structural changes in the given polymeric materials. After interacting with protons with 1, 2, and 3 GeV energies, the material with the lowest Displacement per atom value among the five studied materials is DYNEEMA with values of 1.01E − 25, 9.96E − 26, and 1.00E − 25, respectively. Again, among the materials studied for these three proton energies, DYNEEMA has the highest electronic stopping power values are, respectively, 2.11E − 03, 2.10E − 03, and 2.31E − 03. DYNEEMA has the highest nuclear stopping power values as 2.23E − 07, 1.53E − 07, and 4.27E − 07, respectively.

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来源期刊
CiteScore
3.50
自引率
5.30%
发文量
37
审稿时长
1.6 months
期刊介绍: The scope of the journal is to publish original contributions and reviews on studies, methodologies, instrumentation, and applications involving the analysis and characterization of polymers and polymeric-based materials, including synthetic polymers, blends, composites, fibers, coatings, supramolecular structures, polysaccharides, and biopolymers. The Journal will accept papers and review articles on the following topics and research areas involving fundamental and applied studies of polymer analysis and characterization: Characterization and analysis of new and existing polymers and polymeric-based materials. Design and evaluation of analytical instrumentation and physical testing equipment. Determination of molecular weight, size, conformation, branching, cross-linking, chemical structure, and sequence distribution. Using separation, spectroscopic, and scattering techniques. Surface characterization of polymeric materials. Measurement of solution and bulk properties and behavior of polymers. Studies involving structure-property-processing relationships, and polymer aging. Analysis of oligomeric materials. Analysis of polymer additives and decomposition products.
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