An impact-strengthening, reusable hot-melt structural adhesive derived from branching polyurethane-based supramolecular topology capped by self-complementary hydrogen bonding UPy motifs

•High adhesive strength, multiple reusability and impact-strengthening supramolecular hot melt adhesives.•UPy leads to impact hardening and energy dissipation.•Dynamic non-covalent cross-linked polyurethane hot-melt adhesives are constructed with self-complementary quadruple hydrogen bonds.•Medium viscous flow temperature promotes chain flow to achieve detachment and reusability.