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Exafs Analysis of Ionomers

Published online by Cambridge University Press:  26 February 2011

Y. S. Ding ,
H. K. Pan ,
R. A. Régister  and
S. L. Cooper
Y. S. Ding
Affiliation:
Department of Chemical Engineering University of Wisconsin Madison, WI 53706
H. K. Pan
Affiliation:
Department of Chemical Engineering University of Wisconsin Madison, WI 53706
R. A. Régister
Affiliation:
Department of Chemical Engineering University of Wisconsin Madison, WI 53706
S. L. Cooper
Affiliation:
Department of Chemical Engineering University of Wisconsin Madison, WI 53706
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Abstract

Extended x-ray absorption fine structure (EXAFS) spectroscopy has beensuccessfully applied to the analysis of the ionic domain microstructure inzinc and rubidium neutralized ionomers. In dehydrated zinc neutralizedionomers, the zinc cation was found to be tetrahedrally coordinated to oxygenatoms. For ionomers with hydrocarbon backbones, these oxygen atoms mayoriginate from the sulfonate or carboxylate groups. For ionomers withperfluorinated backbones, some of the oxygen atoms may be ascribed to watercoordination as well. In fully hydrated zinc neutralized ionomers, thezinc cation exists as Zn( H2O)62+. In contrast, the fully hydrated monovalentrubidium neutralized ionomers exhibited a highly disordered environmentabout the cation.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 79: Symposium F – Scattering, Deformation and Fracture in Polymers , 1986 , 167
Copyright
Copyright © Materials Research Society 1987

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