C0-P0 has a large maximum strain of
318%, and a significant EMI snap-through from 23% at 21.0 V μm-1 to 262% at 25.8 V μm-1,
with three intermediate states in between. This large strain snap-through is very similar to a giant
strain snap-through in VHB reported recently,[89] where adjustment of chamber pressure was
used to suppress EMI. The EMI is suppressed in C2-P0, where the snap-through is from 31% at
44.1 V μm-1 to 102% at 54.5 V μm-1. The maximum strain decreases to 125%. If more
crosslinker is used, as in C5-P0, the maximum strain is further reduced to 89%. No significant
strain snap-through can be observed, which indicates that EMI has been completely suppressed.
The similarity of C5-P0 and IPN4905 are further evidenced by the observed electromechanical
properties.
Figure