Structure-property study of keto-ether polyimides



Publisher: National Aeronautics and Space Administration, Langley Research Center, Publisher: For sale by the National Technical Information Service in Hampton, Va, [Springfield, Va

Written in English
Published: Downloads: 185
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Subjects:

  • Polyimides.

Edition Notes

Other titlesStructure property study of keto-ether polyimides
StatementJames F. Dezern and Catharine I. Croall.
SeriesNASA technical memorandum -- 104178
ContributionsCroall, Catharine I., Langley Research Center.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17104479M

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Structure-property study of keto-ether polyimides. [James F Dezern; Catharine I Croall; Langley Research Center.] formatting rules can vary widely between applications and fields of interest or study.

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The purpose of this study was to determine the effect of structural changes in the backbone of keto-ether polyimides on their mechanical properties, specifically, unoriented thin film tensile.

Polyimides VIa-e based on diamine II and various aromatic dianhydrides Va-e were synthesized by the two-stage procedure that included ring-opening, followed by thermal or. Raymond E. Mineck, Study of Potential Aerodynamic Benefits From Spanwise Blowing at Wingtip, NASA TP, Junepp.This report is an expanded version of a thesis submitted in partial fulfillment of the requirements for the Degree of Doctor of Science, George Washington University, Washington, D.C., May Polyimides Containing Aliphatic and Other Flexible Spacers Aliphatic-aromatic polyimides were discovered early at the start of the polyimides era.

They can be prepared from aromatic dianhydrides and aliphatic diamines by several methods, in solution or by melt fusion of salts from a diamine and a tetracarboxylic acid or diacid-diester [2, 14, 15]. Full text of "Progress in polyimide chemistry [electronic resource]" See other formats.

Under these conditions, the keto ether (35) in carbon tetrachloride solution undergoes two processes to give 4-phenylbenzaldehyde (one photon) and 4-phenylbenzyl chloride (two photons), while from ethanol solutions of (39, evidence is obtained to suggest that the formation of the ether (36) arises from a three-photon process (Adam and Schneider).