Nanocomposites of Epoxy with FeO Featuring Dynamic Disulfide Bonds: Fracture Toughness, Reprocessing, and Functional Properties.

Nanocomposites of epoxy with FeO featuring dynamic disulfide bonds were fabricated. To facilitate the dispersion of FeO nanoparticles, we synthesized poly(ε-caprolactone)-grafted FeO nanoparticles, which were then incorporated into epoxy to generate robust interfacial interactions between epoxy and the inorganic nanoparticles. Through this approach, a fine dispersion of the inorganic nanoparticles in the epoxy matrix was successfully obtained.

Recycling of Polydicyclopentadiene Enabled with N-Coordinated Boronic Ester Bonds.

In this contribution, the transformation of polydicyclopentadiene (PDCPD) from thermoset into vitrimer is introduced. First, two N-coordinated diboronic diols are successfully synthesized via the reaction of N,N,N-tri(2-hydroxyethyl)amine and/or N,N,N",N"-tetrakis(2-hydroxyethyl)ethylene diamine with 4-(hydroxymethyl) phenylboronic acid and then they are transformed into two N-coordinated cyclic boronic diacrylates. The latter two dienes carrying electron-withdrawing substituents are used for the ring opening insertion metathesis copolymerization (ROIMP) of dicyclopentadiene to afford the crosslinked PDCPD.