EXAFS study of structural changes in Zr-doped polyimides

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dc.contributor.author Kostov, S. en_US
dc.contributor.author Garan, D. en_US
dc.contributor.author Denboer, M. en_US
dc.contributor.author Greenbaum, S. en_US
dc.contributor.author Illingsworth, Marvin en_US
dc.contributor.author Dai, H. en_US
dc.contributor.author Stapleton, Russell en_US
dc.date.accessioned 2006-07-19T19:40:15Z en_US
dc.date.available 2006-07-19T19:40:15Z en_US
dc.date.issued 1998-03-16 en_US
dc.identifier.citation American Physical Society: Annual March Meeting en_US
dc.identifier.uri http://hdl.handle.net/1850/2170 en_US
dc.description "EXAFS Study of Structural Changes in Zr-doped Polyimides," Proceedings of the Annual March Meeting. American Physical Society. Held in Los Angeles, CA: 16-20 March 1998. en_US
dc.description Article may be found at: http://adsabs.harvard.edu/abs/1998APS..MAR.Q3821K en_US
dc.description RIT community members may access full-text via RIT Libraries licensed databases: http://library.rit.edu/databases/
dc.description.abstract Surfaces of spacecraft in low-earth orbit experience severe erosion by extremely reactive species, such as atomic oxygen (AO). Primary structural materials in spacecraft flight include durable polymer polyimides. To attempt to improve resistance to AO attack, polyimide chemical precursors based on PMDA-ODA polyamic acid have been synthesized with the goal of appending zirconium components onto the main chain, in the hope that initial AO attack would form a protective ZrO2 layer which would inhibit further erosion. The precursor and fully cured polymer are both structurally disordered and cannot be studied by standard x-ray diffraction. We have therefore used extended x-ray absorption fine structure (EXAFS) to examine the zirconium near-neighbor environment in the Zr-containing precursors as a function of curing temperature, in order to look for possible changes in the Zr environment as the polyimide is formed. The results appear to show the formation of ZrO2 upon imidization, consistent with the protective-layer model. en_US
dc.format.extent 37530 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher The American Physical Society en_US
dc.subject Erosion en_US
dc.subject Polymers en_US
dc.subject Spacecraft en_US
dc.title EXAFS study of structural changes in Zr-doped polyimides en_US
dc.type Abstract en_US

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