JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

このアイテムに関連するファイルはありません。

タイトルOptically transparent/colorless polyimides
本文(外部サイト)http://hdl.handle.net/2060/19860006910
著者(英)Ezzell, K. S.; Stclair, T. L.; Slemp, W.; Stclair, A. K.
著者所属(英)NASA Langley Research Center
発行日1985-12-01
言語eng
内容記述Several series of linear aromatic polyimide films have been synthesized and characterized with the objective of obtaining maximum optical transparency. Two approaches have been used as part of this structure-property relationship study. The first approach is to vary the molecular structure so as to separate chromophoric centers and reduce electronic interactions between polymer chains to lower the intensity of color in the resulting polymer films. A second and concurrent approach is to perform polymerizations with highly purified monomers. Glass transition temperatures of thermally cured polyimide films are obtained by thermomechanical analysis and thermal decomposition temperatures are determined by thermogravimetric analysis. Transmittance UV-visible spectra of the polyimide films are compared to that of a commercial polyimide film. Fully imidized films are tested for solubility in common organic solvents. The more transparent films prepared in this study are evaluated for use on second-surface mirror thermal control coating systems. Lightly colored to colorless films are characterized by UV-visible spectroscopy before and after exposure to 300 equivalent solar hours UV irradiation and varying doses of 1 MeV electron irradiation. The effects of monomer purity, casting solvent and cure atmosphere on polyimide film transparency are also investigated.
NASA分類NONMETALLIC MATERIALS
レポートNO86N16380
NASA-TM-87650
NAS 1.15:87650
権利No Copyright
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/154961


このリポジトリに保管されているアイテムは、他に指定されている場合を除き、著作権により保護されています。