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Mechanical characterization of AO-PEG/glutaraldehyde hydrogels. Storage and elastic modulus can be modified by adjusting PEG polymer percentage and/or the r ratio. (A-B) Altering polymer percentage while keeping the crosslinking ratio constant (r = 1.0) can significantly change the mechanical properties of the hydrogel. (C-D) Likewise, changing the crosslinking ratio while keeping the polymer percentage constant (PEG: 3%) can drastically change the storage/loss modulus.
