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Formulation composition and network formulation for the HEMA–DMAEMA hydrogel. (A) Chemical structure of the HEMA and DMAEMA monomers, crosslinker (EGDMA), and photoinitiator (DMPA). (B) Schematic illustration of the hydrogel synthesis process, i.e., mixing, UV light at 20 mW/cm2, and subsequent cutting of hydrogel to size for mechanical analysis using the DMA.
