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用于液氧软管的聚合物薄膜的低温力学性能和稳定性

Cryogenic Mechanical Properties and Stability of Polymer Films for Liquid Oxygen Hoses.

作者信息

Cui Yunguang, Yan Jia, Li Juanzi, Chen Duo, Wang Zhenyu, Yin Wenxuan, Wu Zhanjun

机构信息

State 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.

School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China.

出版信息

Polymers (Basel). 2023 Aug 16;15(16):3423. doi: 10.3390/polym15163423.

DOI:10.3390/polym15163423
PMID:37631479
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10457865/
Abstract

To select the appropriate polymer thin films for liquid oxygen composite hoses, the liquid oxygen compatibility and the cryogenic mechanical properties of four fluoropolymer films (PCTFE, ETFE, FEP and PFA) and two non-fluoropolymer films (PET and PI) before and after immersion in liquid oxygen for an extended time were investigated. The results indicated that the four fluoropolymers were compatible with liquid oxygen before and after immersion for 60 days, and the two non-fluoropolymers were not compatible with liquid oxygen. In addition, the cryogenic mechanical properties of these polymer films underwent changes with the immersion time, and the changes in the non-fluoropolymer films were more pronounced. The cryogenic mechanical properties of the two non-fluoropolymer films were always superior to those of the four fluoropolymer films during the immersion. Further analysis indicated that the fundamental reason for these changes in the cryogenic mechanical properties was the variation in the crystalline phase structure caused by the ultra-low temperature, which was not related to the strong oxidizing properties of the liquid oxygen. Analytical results can provide useful guidance on how to select the appropriate material combination to obtain a reasonable liquid oxygen composite hose structure.

摘要

为选择适用于液氧复合软管的聚合物薄膜，研究了四种含氟聚合物薄膜（聚三氟氯乙烯、乙烯-四氟乙烯共聚物、全氟乙烯丙烯共聚物和全氟烷氧基烷烃）以及两种非含氟聚合物薄膜（聚对苯二甲酸乙二酯和聚酰亚胺）在长时间浸泡于液氧前后的液氧相容性和低温力学性能。结果表明，四种含氟聚合物在浸泡60天前后均与液氧相容，而两种非含氟聚合物与液氧不相容。此外，这些聚合物薄膜的低温力学性能随浸泡时间发生变化，且非含氟聚合物薄膜的变化更为明显。在浸泡过程中，两种非含氟聚合物薄膜的低温力学性能始终优于四种含氟聚合物薄膜。进一步分析表明，低温力学性能发生这些变化的根本原因是超低温导致的晶相结构变化，这与液氧的强氧化性无关。分析结果可为如何选择合适的材料组合以获得合理的液氧复合软管结构提供有用指导。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/de19e04fa9d8/polymers-15-03423-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/a719bbedadb1/polymers-15-03423-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/a6bc1a125909/polymers-15-03423-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/356bd5a7b036/polymers-15-03423-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/7172a0d61e57/polymers-15-03423-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/8d00d674aff1/polymers-15-03423-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/991a6ba3a7d7/polymers-15-03423-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/710a41ea0c4d/polymers-15-03423-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/a719bbedadb1/polymers-15-03423-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/f84fa65173ba/polymers-15-03423-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/03b7cf82681a/polymers-15-03423-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/910215f9d73b/polymers-15-03423-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f3e/10457865/de19e04fa9d8/polymers-15-03423-g012.jpg

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A Review of the Polymer for Cryogenic Application: Methods, Mechanisms and Perspectives.
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