液氧软管的聚合物膜的冷机械性能和稳定性 液氧软管的聚合物膜的冷机械性能和稳定性
Yunguang Cui1, Jia Yan1, Juanzi Li2
1State Key Laboratory of Structural Analysis for Industrial Equipment, School of Aeronautics and Astronautics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, China.
聚合物与液态氧相容,与非聚合物不同. 低温机械性能随着浸泡时间的变化而变化,这是由于温度而不是氧气.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 低温生化技术 (Cryogenics) 是一种
背景情况:
- 为液氧 (LOX) 复合软管选择合适的聚合物薄膜对于安全性和性能至关重要.
- 了解LOX暴露下的材料兼容性和冷性质是必不可少的.
研究的目的:
- 评估聚合物和非聚合物薄膜的液氧兼容性和冷机械性能.
- 研究长时间浸入液氧对这些特性的影响.
- 为选择适合液氧复合软管的材料提供指导.
主要方法:
- 研究了四种聚合物薄膜 (PCTFE,ETFE,FEP,PFA) 和两种非聚合物薄膜 (PET,PI) 的液氧兼容性.
- 在液氧中浸泡60天前后评估了冷机械性能.
- 使用分析技术分析了结晶相结构的变化.
主要成果:
- 四种聚合物 (PCTFE,ETFE,FEP,PFA) 在60天后显示出极好的液氧兼容性.
- 两种非聚合物 (PET,PI) 与液态氧不兼容.
- 所有薄膜的冷机械性能随浸泡时间而变化,非聚合物的变化更为明显.
- 在整个浸泡期内,非聚合物薄膜表现出优越的冷机械性能.
- 观察到的性能变化归因于温度诱导的结晶相变化,而不是液氧的氧化性质.
结论:
- 聚合物薄膜适用于液氧复合软管,因为它们的兼容性.
- 非聚合物薄膜不推用于液氧应用.
- 材料的选择应考虑冷机械性能稳定性和与液态氧的兼容性.
- 了解超低温对聚合物晶体结构的影响,是材料设计的关键.
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