| タイトル | Polyimides Derived from Novel Asymmetric Benzophenone Dianhydrides |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150004039 |
| 著者（英） | Chuang, Chun-Hua |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 2015-03-31 |
| 言語 | eng |
| 内容記述 | This invention relates to the composition and processes for preparing thermoset polyimides derived from an asymmetric dianhydride, namely 2,3,3',4'-benzophenone dianhydride (a-BTDA) with at least one diamine, and a monofunctional terminal endcaps. The monofunctional terminating groups include 4-phenylethynylphthalic anhydride ester-acid derivatives, phenylethyl trimellitic anhydride (PETA) and its ester derivatives as well as 3-phenylethynylaniline. The process of polyimide composite comprises impregnating monomer reactants of dianhydride or its ester-acid derivatives, diamine and with monofunctional reactive endcaps into glass, carbon, quartz or synthetic fibers and fabrics, and then stack up into laminates and subsequently heated to between 150-375.degree. C. either at atmosphere or under pressure to promote the curing and crosslinking of the reactive endcaps to form a network of thermoset polyimides. |
| NASA分類 | Composite Materials |
| 権利 | No Copyright |
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