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(a) Load-extension profiles of crosslinked KGM-borax samples as prepared and after healing. (b–e) A self-healed sample being stretched to break. (b) Sample before test, at a rest length of 35 mm. Arrows indicate the position of the seam where the sample was cut and healed. (c) Sample at an intermediate extension. (d) A crack appears in the material at the location indicated by the arrow. (e) Snapshot of the sample before breaking. Color images are available online.
