A Toughening and Anti‐Counterfeiting Benzotriazole‐Based High‐Performance Polymer Film Driven by Appropriate Intermolecular Coordination Force

Abstract

It is of great significance to circumvent the inherent trade‐off between strength and extensibility for epoxy resins. Herein dynamic Cu‐benzotriazole cross‐links are incorporated, as the appropriate intermolecular coordination interaction, into high performance epoxy networks, and the resulting epoxy resins exhibits outstanding thermal stability and mechanical properties, their strength and extensibility are simultaneously improved. Additionally, local manipulation of coordination crosslinking confers the film with anti‐counterfeiting function.

A facile strategy to improve the strength and toughness of high-performance polymers and recycling by dynamic Ni-coordination crosslinking

“…Recently, supramolecular interactions, such as dynamic metal coordination, have been widely introduced into covalent cross-linking networks to improve the applicability of materials, because the conformation of the polymer chains can be changed from one state to another and energy can be effectively dissipated by the supramolecular interactions. [17][18][19][20][21][22] Hence, coordination polymers have received more and more attention owing to their controllable and interesting structures, excellent thermal stabilities, physical reversibility, and good mechanical properties. 23 And the coordination interactions between metal cations and ligands are stronger than hydrogen bonds and ordinary intermolecular forces.…”