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Averaged stress-relaxation profiles of the hydrogels with the monomer AAMPSO3 (2 mol/L) with BAP (2 mol%) as a crosslinker (ε = 8%; n = 3) (a) to the total stress and (b) the residual stress, as well as (c) the cyclic compression loading of one AAMPSO3 sample and (d) the normalized residual stress of the averaged AAMPSO3 samples.
