Fig. 3: Loading rate–sensitivity, mechanical durability, and resistance to crack propagation of FTD-C gel. | Nature Communications

Fig. 3: Loading rate–sensitivity, mechanical durability, and resistance to crack propagation of FTD-C gel.

From: Coordinatively stiffen and toughen polymeric gels via the synergy of crystal-domain cross-linking and chelation cross-linking

Fig. 3

a Tensile stress-strain curves of the FTD-C gel with different loading rates. b Elastic modulus and toughness of the FTD-C gel with different loading rates. c Cyclic stretching curve of FTD-C gel for over 10,000 cycles at a predeterminate strain of 50%. d Experimental determination of fracture energy. e The FTD-C gel containing the notch was stretched to 7 times its initial length. f Schematic diagram of the crack resistance of a material. g Γ of various materials versus energy dissipation density, W. The slopes shown by the dotted lines reflect the size of the energy dissipation zone of different materials. h–i Comparison of the prepared FTD-C gels: (h) toughness vs ultimate tensile stress, and (i) elastic modulus vs ultimate tensile stress (microphase separation72, mechanical training73, phase separation20, ion-induced and salting-out62, solvent-exchange and salting-out65, solvent-exchange and wet-annealing48, freeze-casting and salting-out17, anisotropic densification and ionic cross-linking74, coordinated supramolecular solvents50, solvent-replacement64, solution annealing and dual cross-linking75, nanofibrils-filled76). Data are presented as mean ± standard deviation (n = 3 independent samples).

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