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Optical images of damaged and repaired EA copolymers containing 3% of 7-methacryloyloxy coumarin as photoreactive pendant groups. (a) Healing an inserted crack (1) using light only (2) and (b) healing an inserted crack (1) by heating only (2). Republished with permission of the Royal Society of Chemistry, from [179]; permission conveyed through Copyright Clearance Center, Inc.
