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Morphological Manipulation and Plasticization of the Electrostatic Network in Perfluorosulfonate Ionomers

Published online by Cambridge University Press:  01 February 2011

Alan K. Phillips  and
Robert B. Moore
Alan K. Phillips
Affiliation:
Department of Polymer Science, The University of Southern Mississippi, 118. College Dr # 10076 Hattiesburg, MS 39406–001
Robert B. Moore
Affiliation:
Department of Polymer Science, The University of Southern Mississippi, 118. College Dr # 10076 Hattiesburg, MS 39406–001
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Abstract

The addition of small molecule fluorosurfactants to perfluorosulfonate ionomers has been found to have a profound effect on the morphology and mechanical properties of solution processed membranes. Perfluorooctane sulfonates neutralized with both alkali metal and alkylammonium counterions have been incorporated into solution processed Nafion® membranes. Sodium neutralized fluorosurfactants were found to crystallize during membrane casting leading to the formation of a surface layer of crystalline material.

Tetramethylammonium neutralized surfactants behave in a similar fashion with crystallization of the surfactant occurring during casting. The use of large tetrabutylammonium counterions is found to prevent crystallization of the surfactant and create a highly plasticized membrane.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 856: Symposium BB – Multicomponent Polymer Systems-Phase Behavior, Dynamics, and Applications , 2004 , BB8.11
Copyright
Copyright © Materials Research Society 2005

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References

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