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Publication Citation: Direct Analysis of the Ion-Hopping Process Associated With the [alpha]-Relaxation in Perfluorosulfonate Ionomers Using Quasielastic Neutron Scattering

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Author(s): Kirt A. Page; Jong K. Park; R B. Moore; Victoria Garcia Sakai;
Title: Direct Analysis of the Ion-Hopping Process Associated With the [alpha]-Relaxation in Perfluorosulfonate Ionomers Using Quasielastic Neutron Scattering
Published: April 14, 2009
Abstract: This work demonstrates the ability of quasi-elastic neutron scattering to observe the dynamics associated with counterions in perfluorosulfonate ionomers (PFSIs). PFSI membranes were prepared by neutralizing with hydrogenated alky ammonium counterions. Counterion dynamics were measured using the high-flux back-scattering spectrometer at the NIST Center for Neutron Research (NCNR). The data presented here show the link between the onset of long-range counterion mobility and the mechanical properties of these materials. These data provide further fundamental understanding of the link between electrostatic interactions and dynamics in ionomers.
Citation: Macromolecules
Volume: 42
Pages: pp. 2729 - 2736
Research Areas: Polymers, MSEL
PDF version: PDF Document Click here to retrieve PDF version of paper (407KB)