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Mechanical properties of CMCS-Ca2+/PAAm/PNMA hydrogels. (a) The stress–strain behavior and (b) the corresponding toughness and elastic modulus of the CMCS-Ca2+/PAAm/PNMA hydrogels as a function of different NMA content; (c) the stress–strain behavior and (d) the corresponding toughness and elastic modulus of the CMCS-Ca2+/PAAm/PNMA hydrogels as a function of different addition of CaCl2 content.
