Introduction Polyurethane (PU) materials, known for their versatility and wide range of applications, are synthesized through the reaction of polyols and isocyanates. While this reaction primarily leads to the formation of urethane linkages, the presence of trimerization catalysts can promote the formation of isocyanurate rings, resulting in polyisocyanurate (PIR) or modified polyurethane-isocyanurate (PUR/PIR) materials. These...