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000034058 0247_ $$2DOI$$a10.1002/polb.10764
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000034058 084__ $$2WoS$$aPolymer Science
000034058 1001_ $$0P:(DE-HGF)0$$aPrado, L.$$b0
000034058 245__ $$aAnomalous Small-Angle X-Ray Scattering Characterization of Composites Based on Sulfonated Poly(ether ether ketone), Zirconium Phosphates, and Zirconium Oxide
000034058 260__ $$aBognor Regis [u.a.]$$bWiley$$c2003
000034058 300__ $$a567 - 575
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000034058 440_0 $$08821$$aJournal of Polymer Science B - Polymer Physics$$v42$$x0887-6266
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000034058 520__ $$aThe morphology and distribution of zirconium oxide and zirconium phosphates in a matrix of sulfonated poly(ether ether ketone) (SPEEK) were investigated with anomalous small-angle X-ray scattering (ASAXS) and electron microscopy. ASAXS revealed that ZrO2 was distributed in the SPEEK matrix in the form of nanoparticles smaller than 13 Angstrom. A decrease in the conductivity suggested that the sulfonic groups were bound to the zirconium oxo species at the particle surface. Furthermore, two kinds of membranes containing zirconium phosphate were investigated. In one case, the phosphate was directly dispersed in the polymer solution for the casting of the membrane. In the other case, the phosphate was previously treated with n-propyl ammonium and polybenzimidazole. From ASAXS data, the fractal dimension could be estimated. Mass-fractal behavior was confirmed for the SPEEK membrane containing previously exfoliated zirconium phosphate, with aggregates of 6.3-165 Angstrom. Surface-fractal behavior was detected for membranes with untreated phosphates, with aggregates of 6.4-185 Angstrom. The untreated phosphates caused an increase in the permeability, without changing the proton conductivity much. (C) 2003 Wiley Periodicals, Inc.
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000034058 65320 $$2Author$$aanomalous small-angle X-ray scattering
000034058 65320 $$2Author$$acomposites
000034058 65320 $$2Author$$amembranes
000034058 65320 $$2Author$$amicrostructure
000034058 7001_ $$0P:(DE-HGF)0$$aWittich, H.$$b1
000034058 7001_ $$0P:(DE-HGF)0$$aSchulte, K.$$b2
000034058 7001_ $$0P:(DE-Juel1)VDB472$$aGoerigk, G.$$b3$$uFZJ
000034058 7001_ $$0P:(DE-HGF)0$$aGaramus, V. M.$$b4
000034058 7001_ $$0P:(DE-HGF)0$$aWillumeit, R.$$b5
000034058 7001_ $$0P:(DE-HGF)0$$aVetter, S.$$b6
000034058 7001_ $$0P:(DE-HGF)0$$aRuffmann, B.$$b7
000034058 7001_ $$0P:(DE-HGF)0$$aNunes, T.$$b8
000034058 773__ $$0PERI:(DE-600)1473448-5$$a10.1002/polb.10764$$gVol. 42, p. 567 - 575$$p567 - 575$$q42<567 - 575$$tJournal of polymer science / B$$v42$$x0887-6266$$y2003
000034058 8567_ $$uhttp://dx.doi.org/10.1002/polb.10764
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