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

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

doi:10.3390/polym15163423

Polymers (Aug 2023)

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

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

Affiliations

Yunguang Cui: 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
Jia Yan: 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
Juanzi Li: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
Duo Chen: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
Zhenyu Wang: 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
Wenxuan Yin: 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
Zhanjun Wu: 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

DOI: https://doi.org/10.3390/polym15163423
Journal volume & issue: Vol. 15, no. 16
p. 3423

Abstract

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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.

Published in Polymers

ISSN: 2073-4360 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/polymers/

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