 Polymer-based materials known as polyvinylbutyral, PVB, reinforced with graphite nanoplatelets, GNPs, were used as coupling layers in ultrasonic welding, UW, of thermoset-composited herons. The study showed that the addition of GNPs improved the lap shear strength, LSS, of the nanocomposites by up to 80%. This suggests that the use of high-damping nanocomposites as coupling materials for thermoset composites paves the way for a new generation of ultrasonically weldable energy directors. This article was authored by Fabrizia Salendo, Alessio Bassano, Luigi Sorrentino, and others.