Fig. 2. The design of a tough adhesive from commodity polymer.

(A) Synthesis of crosslinked SiNP S-Bpin composites from S-Bpin and SiNPs, where S-Bpin was prepared from commodity polymer SEBS. (B) Synthesis of the model compound to confirm the formation of B-O bond from phenylboronic pinacol ester and SiNPs. (C) DFT calculations confirmed that covalent bonds can form between silicate surfaces and the polymer matrix (the bidentate binding geometry is depicted). (D) Dynamic boronic ester exchange crosslinking reaction between hydroxyl groups on SiNPs and boronic ester groups of S-Bpin affords reprocessable materials.