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Photographs of the silica/epoxy vitrimer nanocomposite (sample N2-5) before (a) and after (b) welding at 160 °C for 6 h and after lap-shear test of the welded sample (c). Stress–strain curves (d) of epoxy/silica vitrimer samples at different content of nanoparticles: 0 (sample V2), 5 (sample N2-5) and 10 wt% (sample N2-10) welded under similar conditions (160 °C, 5 h).
