Fig. 3: PEG hydrogel and PEG-PAAc hydrogel.
From: Unusually long polymers crosslinked by domains of physical bonds
a Stress-stretch curves, along with photos of the two hydrogels. b When the PEG hydrogel is stretched, the covalent crosslinks prevent the entanglements from disentangling. c When the PEG-PAAc hydrogel is stretched, the domains remain intact, and act as high-functionality crosslinks, which also prevent the entanglements from disentangling. d The properties of PEG hydrogel (black columns) and PEG-PAAc hydrogel (red columns). Data with error bars in (d) are presented as mean values ± standard deviations (s.d.) of n  =  3 replicates.
