Epoxy/block copolymer and nanocomposite systems for structural adhesive applications

Abstract

Epoxy-based structural adhesives are essential in various industries due to their exceptional mechanical properties and strong adhesion. However the brittleness of epoxy resins has prompted researchers to enhance their toughness and performance through innovative methods. This chapter focuses on two promising strategies: the incorporation of block copolymers (BCPs) and nanofillers to develop advanced epoxy nanocomposites. BCPs serve as effective toughening agents by self-assembling into nanostructures within the epoxy matrix, significantly improving fracture toughness and impact resistance. Meanwhile nanofillers such as nanosilica and graphene nanoplatelets enhance mechanical, thermal, and electrical properties. The combination of BCPs and nanofillers leads to complex toughening mechanisms that surpass the performance of each component alone. As the need for lightweight, durable materials grows in aerospace, automotive, and electronics, these hybrid epoxy systems hold great promise for advancing structural adhesive technology and meeting specific application requirements. © 2026 Elsevier Inc. All rights reserved..