Page, K.
, Park, J.
, Moore, R.
and Garcia, V.
(2009),
Direct Analysis of the Ion-hopping Process Associated with the a-Relaxation in Perfluorosulfonate Ionomers using Quasielastic Neutron Scattering, Macromolecules, [online], https://doi.org/10.1021/ma801533h (Accessed May 2, 2026)
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Direct Analysis of the Ion-hopping Process Associated with the a-Relaxation in Perfluorosulfonate Ionomers using Quasielastic Neutron Scattering
Published
Author(s)
, Jong K. Park, R B. Moore, Victoria Garcia Sakai
Abstract
This work demonstrates the ability of quasi-elastic neutron scattering (QENS) to measure 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 National Institute of Standards and Technology (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 PFSI materials.Citation
Macromolecules
Volume
42
Issue
7
Pub Type
Journals
Download Paper
Keywords
fuel cell membrane, ionomer, dynamics, QENS, counterion
Citation
Issues
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Created March 23, 2009, Updated November 10, 2018