Fig. 4. PEA-PAAc hydrogel and PEA-PAAc organogel.

(A) Whereas stage IV PEA-PAAc hydrogel separates into phases and is opaque, the PEA-PAAc organogel does not separate into phases and is transparent. (B) The PEA-PAAc hydrogel and organogel are stretched until rupture. (C) The stress-stretch curves of the PEA-PAAc hydrogels with varying volumetric fraction of PEA, ϕ_PEA. (D) The stress-stretch curves are replotted using $\mathrm{\lambda }{\mathrm{\phi }}_{\mathrm{PEA}}^{-1/3}$ and $s{\mathrm{\phi }}_{\mathrm{PEA}}^{-2/3}$.