• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>IUPAC 10th International conference on novel materials and their synthesis: Book of abstracts >ADVANCED POLYIMIDE MATERIALS FOR AEROSPACE APPLICATIONS
【24h】

ADVANCED POLYIMIDE MATERIALS FOR AEROSPACE APPLICATIONS

机译：航空应用的高级聚酰亚胺材料

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Aromatic polyimides have been extensively used in the manufacturing of spacecrafts and air engines due to their excellent thermal and mechanical properties. Polyimides are usually employed as the matrix resins of carbon (or quartz) fiber-reinforced composites for structural or sub-structural applications, or as the thermal control shielding films and the solar cell substrate in satellite, as the solar sail membranes in space vehicles etc. However, there will be a big problem when polyimide materials are serviced in the low-earth-orbit (LEO) environment (100-1000 km in altitude) where the atomic oxygen (AO) can seriously erode the surface of most orgainc materials, resulting in the polymer degradation with mass loss. Hence, seeking for effective approaches to enhance the LEO performance of polyimides has been a hot subject in recent years. It was found that the P- or Si-contained groups in the polyimides could be decomposed by AO exposure to yield an inert metal oxide layer on the polymer surface which could efficiently prevent the polyimide film from the further AO erosion. Although a lot of polyimide films have been developed for applications in LEO environment, there is few research works concerning the inherent AO-resistant polyimide as the matrix resins of the carbon (or quartz) fiber-reinforced composites for aerospace applications. In this study, phosphenyl-containing phenylethynyl endcapped imide oligomers with designed calculated molecular weights (Calc'd Mn) and different phosphorous contents (P-loading) were synthesized via a PMR (Polymerization of monomer reactants) method. The PMR resin solutions were then employed to prepare fiber reinforced composites. Effect of atomic oxygen (AO) exposure on properties of the composites was evaluated on a ground-based simulation facility. It was found that the polyimide composites with higher P-loadings exhibited better AO resistance. In addition, types of reinforcing fibers also have impact on composite's AO resistant properties. In addition, high impact toughness polyimide resins for carbon fiber composites have also been investigated for aerospace applications.
机译：芳香族聚酰亚胺由于其出色的热和机械性能而被广泛用于航天器和航空发动机的制造中。聚酰亚胺通常用作结构（或子结构）应用的碳（或石英）纤维增强复合材料的基质树脂，或用作人造卫星的热控屏蔽膜和太阳能电池基板，以及用作航天器的太阳帆膜等。但是，在低地球轨道（LEO）环境（海拔100-1000 km）中使用聚酰亚胺材料时，会遇到很大的问题，在该环境中原子氧（AO）会严重腐蚀大多数有机材料的表面，导致聚合物质量下降而降解。因此，近年来寻求有效的方法来增强聚酰亚胺的LEO性能一直是热门话题。发现聚酰亚胺中的含P或Si的基团可以通过AO暴露而分解，从而在聚合物表面上产生惰性金属氧化物层，该惰性金属氧化物层可以有效地防止聚酰亚胺膜受到进一步的AO腐蚀。尽管已经开发出许多聚酰亚胺膜用于LEO环境，但很少有研究工作涉及固有的抗AO聚酰亚胺作为航空航天应用的碳（或石英）纤维增强复合材料的基质树脂。在这项研究中，通过PMR（单体反应物的聚合）方法合成了具有设计的计算分子量（Calc'd Mn）和不同磷含量（P负载）的含磷烯基的苯基乙炔基封端的酰亚胺低聚物。然后将PMR树脂溶液用于制备纤维增强复合材料。在地面模拟设备上评估了原子氧（AO）暴露对复合材料性能的影响。已经发现，具有较高P载荷的聚酰亚胺复合材料表现出更好的抗AO性。此外，增强纤维的类型也会影响复合材料的抗AO性能。另外，还已经研究了用于碳纤维复合材料的高冲击韧性聚酰亚胺树脂在航空航天中的应用。

著录项

  • 来源
  • 会议地点 Zhengzhou(CN)
  • 作者

    Shiyong Yang; Biao Liu; Mian Ji; Jingang Liu; Lin Fan;

  • 作者单位

    The Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Acadamy of Sciences, Beijing 100190, China;

    The Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Acadamy of Sciences, Beijing 100190, China;

    The Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Acadamy of Sciences, Beijing 100190, China;

    The Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Acadamy of Sciences, Beijing 100190, China;

    The Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Acadamy of Sciences, Beijing 100190, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号