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Small-Angle Scattering Study of Perfluorosulfonated Ionomer Solutions

Loppinet, Benoit, Gebel, Gérard, Williams, Claudine E.·1997·The Journal of Physical Chemistry B
DOI 10.1021/jp9623047
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Abstract

A structural study of perfluorosulfonated ionomer (PFSI) solutions in polar solvents such as alcohols, amides, and water using both small-angle X-ray and neutron scattering is presented. Contrast variation methods have shown that the ionomer molecule particles form dense particles of constant scattering length. The study of dilute solutions allows one to evidence the rodlike structure of PFSI solutions. The radius of the cylindrical particles is determined from both the shape and the intensities of the scattering curves. These results are confirmed by the analysis of the asymptotic behavior at large angles of the scattering curves. Typical values for the radii are found to be around 20 Å. The diameter of the rod is shown to be related to the polymer−solvent interfacial energy, whereas the dielectric constant of the solvent acts only on the local order. Mixtures of solvents have been used to check the evolution of the structure with the solvents. The effect of the counterion is also studied. The effect of added salt on the small-angle scattering spectra can be interpreted as due to a decrease of the local order through the disappearance of the interference term and the shape of the particles is not modified.

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Metadata

Authors
Loppinet, B., Gebel, G., & Williams, C. E.
Venue
The Journal of Physical Chemistry B
Publisher
American Chemical Society (ACS)
Published
1997-03-01
Volume
101
Issue
10
Pages
1884-1892
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
DOI
10.1021/jp9623047
OpenAlex
W2061341731
Cited by
199
References
0
FWCI
6.03
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Small-Angle Scattering Study of Perfluorosulfonated Ionomer Solutions. https://app.cochat.ai/papers/10.1021/jp9623047
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Loppinet, B., Gebel, G., & Williams, C. E. (1997). Small-Angle Scattering Study of Perfluorosulfonated Ionomer Solutions. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp9623047

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