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. Author manuscript; available in PMC: 2015 May 20.
Published in final edited form as: Nat Commun. 2014;5:3218. doi: 10.1038/ncomms4218

Figure 4. Mechanical characterization of HUB-based cross-linked poly(urethane-urea).

Figure 4

(a) Stress-strain curves of 6a, 6c and 6e. (b) Creep-recovery of 6a, 6c and 6e with initial strain of 50%. (c) Inefficient recovery of the breaking strain of 6e after long period of healing. (d) Recovery of breaking strain of sample 6c under various healing conditions. The breaking strain of the cut and healed 6c was efficiently and largely restored after 12 h self-healing (87%) at 37°C. The healing at room temperature is less efficient (dotted line).