Zr-containing 4,4'-ODA/PMDA polyimide composites parts I and II

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dc.contributor.author Illingsworth, Marvin en_US
dc.contributor.author Betancourt, J. en_US
dc.contributor.author He, Liling en_US
dc.contributor.author Chen, Yang en_US
dc.contributor.author Terschak, John en_US
dc.contributor.author Banks, B. en_US
dc.contributor.author Rutledge, S. en_US
dc.contributor.author Cales, M. en_US
dc.date.accessioned 2004-07-30T15:06:21Z en_US
dc.date.available 2004-07-30T15:06:21Z en_US
dc.date.issued 2001-08 en_US
dc.identifier.citation Illingsworth, M.L.; Betancourt, J.A.; He, L.; Terschak, J.A.; Banks, B.A.; Rutledge, S.K.; Cales, M. Zr-Containing 4,4'-ODA/PMDA Polyimide Composites Parts I and II; NASA/TM-2001-211099; National Aeronautics and Space Administration: Washington, D.C., August 2001. en_US
dc.identifier.other NASA/TM-2001-211099 en_US
dc.identifier.uri http://hdl.handle.net/1850/262 en_US
dc.description.abstract The objective of this research is to improve the atomic oxygen resistance of KaptonTM, a polyimide (PI) made from pyromellitic acid dianhydride (PMDA) and 4,4'-oxydianiline (ODA), while retaining or enhancing the desirable properties of the pure polymer. Toward this end, zirconium-containing complexes and polymers were used to make composites and blends. Tetra(acetylacetonato)zirconium(IV), Zr(acac)4, which is commercially available, was identified as the best zirconium-containing complex for enhancing the atomic oxygen resistance of polyimide composites of the 10 complexes screened. Films prepared from the commercially-available polyamic acid (PAA) of PMDA-ODA (DuPont) have good uniformity, flexibility, and tensile strength. A 24-layer 10% (mol) Zr(acac)4/PI composite film showed significant improvement (ca. 20 fold) of atomic oxygen resistance over the pure polyimide. However, 10% (mol) Zr(acac)4 represents an upper concentration limit, above which films undergo cracking upon thermal imidization. In order to increase the Zr complex concentration in PMDA-ODA PI films, while retaining good film properties, [Zr(adsp)2-PMDA]n coordination polymer [bis(4-amino-N,N'-disalicylidene-1,2-phenylenediamino)zirconium(IV)-pyromellitic dianhydride] and [Zr(adsp)2-PMDA-ODA-PMDA]n terpolymer were synthesized and blended with commercial PAA, respectively. Several techniques were used to characterize the films made from the polymer containing Zr(acac)4. Plasma studies of films having 2% (mol) incremental concentrations of Zr in the Kapton up to 10% (mol) show that the overall rate of erosion is reduced about 75 percent. en_US
dc.format.extent 17189677 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher National Aeronautics and Space Administration en_US
dc.relation RIT Scholars content from RIT Digital Media Library has moved from http://ritdml.rit.edu/handle/1850/262 to RIT Scholar Works http://scholarworks.rit.edu/article/1098, please update your feeds & links!
dc.subject Atomic oxygen en_US
dc.subject Atomic oxygen resistance en_US
dc.subject Blends en_US
dc.subject Erosion en_US
dc.subject Multilayer polyimide films en_US
dc.subject Polyimide films en_US
dc.subject Zirconium complexes en_US
dc.subject Zr containing polyimides en_US
dc.title Zr-containing 4,4'-ODA/PMDA polyimide composites parts I and II en_US
dc.type Preprint en_US

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