| タイトル | Low-Cost, High Glass-Transition Temperature, Thermosetting Polyimide Developed |
| 本文（外部サイト） | http://hdl.handle.net/2060/20050187016 |
| 著者（英） | Chuang, Kathy C. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1999-04-01 |
| 言語 | eng |
| 内容記述 | PMR-15 polyimide, developed in the mid-1970's at the NASA Lewis Research Center, is recognized as a state-of-the-art high-temperature resin for composite applications in the temperature range of 500 to 550 F (260 to 288 C). PMR-15 offers easy processing and good property retention at a reasonable cost. For these reasons, it is widely used in both military and commercial aircraft engine components. Traditionally, polyimide composites have been designed for long-term use at 500 to 600 F over thousands of hours. However, new applications in reusable launch vehicles (RLV's) require lightweight materials that can perform for short times (tens of hours) at temperatures between 800 and 1000 F (425 and 538 C). Current efforts at Lewis are focused on raising the use temperature of polyimide composites by increasing the glass-transition temperature of the matrix resins. Achieving this dramatic increase in the upper use temperature without sacrificing polymer and composite processability is a major technical challenge. |
| NASA分類 | Composite Materials |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/86006 |
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