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Figure 4. (a) Images showing how the iono-elastomer’s extensional properties are measured using a Sentmanat Extensional
Rheometer taken at indicated elongation strain values. (b) Engineering stress as a function for elongation strain is plotted
for the iono-elastomer as compared to a standard, commercial rubber band. The figure was reproduced from and with
permission of the American Chemical Society, copyright 2016 (36).
Figure 5. (a) Normalized electrical resistance as a function of elongation strain for our iono-elastomer and calculated for
a copper wire under the same hypothetical strain. Notice the unexpected behavior showing a decrease in resistance with
elongation. (b) Schematic illustrating how resistance increases with extension for a normal material, such as the copper wire.
