含磷硅环氧杂化材料液氧相容性与低温力学性能研究
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- 英文论文题名：Liquid oxygen compatibility and cryogenic mechanical properties of a novel phosphorous/silicon containing epoxy–based hybrid
- 论文作者：李家亮 ; 武湛君
- 英文论文作者：Li Jialiang ; Wu Zhanjun ; School of Aeronautics and Astronautics ; Dalian University of Technology
- 年：2016
- 作者机构：大连理工大学航空航天学院;
- 论文关键词：环氧杂化材料 ; 磷 ; 硅 ; 液氧相容性 ; 低温力学性能
- 会议召开时间：2016-11-25
- 会议录名称：2016年航空科学与技术全国博士生学术论坛摘要集
- 语种：中文
- 分类号：V434;V250.2
- 学会代码：XBHH
- 会议名称：2016年航空科学与技术全国博士生学术论坛
- 会议地点：中国陕西西安
- 主办单位：西北工业大学研究生院、中国高校航空学院院长联席会
- 学会名称：西北工业大学航空学院
- 页数：1
- 文件大小：643k
- 原文格式：D
- 会议级别：全国
摘要
本文通过含有9,10–二氢–9–氧杂–10–磷杂菲–10–氧化物(DOPO)结构的环氧树脂与3–缩水甘油醚氧基丙基三甲氧基硅烷(GLYMO)合成了一种新型含磷硅环氧杂化材料。液氧冲击测试显示该材料与液氧相容。由于磷硅协同作用机制,与纯环氧树脂、DOPO环氧树脂和只含硅的环氧杂化材料相比,该材料具有显著提高的热稳定性,并且可以推断热稳定性的提高有助于改善液氧相容性。经过一周的液氧浸泡测试,与纯环氧树脂相比,该材料的表面粗糙度变化较小,证明其在低温下具有较高的抗裂性。表面元素分析显示液氧冲击后该材料氧化程度最低,说明磷硅协同机制在提高液氧相容性方面起到了作用。力学性能测试发现,常温与90 K下,DOPO与GLYMO预聚物的引入改善了环氧树脂的延展性,导致断裂韧性提高。这些结果表明该磷硅环氧杂化材料具有作为复合材料液氧贮箱基体材料的潜质。
A novel phosphorous/silicon containing epoxy–based hybrid was synthesized by 9,10–dihydro–9–oxa–10–phosphaphenanthrene–10–oxide(DOPO) containing epoxy resin and 3–glycidoxy–propyltrimethoxysilane(GLYMO). It was compatible with liquid oxygen according to the liquid oxygen impact test. Furthermore, the hybrid possessed significantly enhanced thermal stability compared with the neat and DOPO containing epoxy resin and the silicon containing epoxy hybrid due to the phosphorous/silicon synergetic mechanism. It could be inferred that enhanced thermal stability had a positive effect on liquid oxygen compatibility. After one week of the liquid oxygen immersion test, the surface roughness of the hybrid changed less compared with the neat epoxy resin, implying the hybrid owned higher crack resistance under cryogenic temperature. Surface elemental content analysis showed that the hybrid possessed the lowest oxidative degree after liquid oxygen impact test, proving that the phosphorous/silicon synergetic mechanism has worked on enhancing liquid oxygen compatibility. Besides, the incorporation of DOPO and GLYMO prepolymer endowed the epoxy resin with improved ductility at both room temperature and 90 K, consequently leading to the increased fracture toughness. The above results lead to the conclusion that the synthesized hybrid has the potential as the matrix material of composite liquid oxygen tanks.
A novel phosphorous/silicon containing epoxy–based hybrid was synthesized by 9,10–dihydro–9–oxa–10–phosphaphenanthrene–10–oxide(DOPO) containing epoxy resin and 3–glycidoxy–propyltrimethoxysilane(GLYMO). It was compatible with liquid oxygen according to the liquid oxygen impact test. Furthermore, the hybrid possessed significantly enhanced thermal stability compared with the neat and DOPO containing epoxy resin and the silicon containing epoxy hybrid due to the phosphorous/silicon synergetic mechanism. It could be inferred that enhanced thermal stability had a positive effect on liquid oxygen compatibility. After one week of the liquid oxygen immersion test, the surface roughness of the hybrid changed less compared with the neat epoxy resin, implying the hybrid owned higher crack resistance under cryogenic temperature. Surface elemental content analysis showed that the hybrid possessed the lowest oxidative degree after liquid oxygen impact test, proving that the phosphorous/silicon synergetic mechanism has worked on enhancing liquid oxygen compatibility. Besides, the incorporation of DOPO and GLYMO prepolymer endowed the epoxy resin with improved ductility at both room temperature and 90 K, consequently leading to the increased fracture toughness. The above results lead to the conclusion that the synthesized hybrid has the potential as the matrix material of composite liquid oxygen tanks.
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