Elsevier

Polymer

Volume 21, Issue 4, April 1980, Pages 432-435
Polymer

Polymer paper
Dual cohesive energy densities of perfluorosulphonic acid (Nafion) membrane

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Abstract

The cohesive energy density of Nafion has been determined experimentally from swelling measurements using the method of Britow and Watson. The results show that there are two distinct swelling envelopes corresponding to dual cohesive energy densities: one is ascribed to the organic part of the membrane, whereas the other is tentatively attributed to the ion clusters in the material. In addition, the cohesive energy density of Nafion, calculated from both Small's and Hayes' methods, are in agreement with experimental results.

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