Enhancing Polyurethane Composites: Antioxidant, Heat, and Hydrolysis Resistance Introduction Polyurethane (PU), a versatile polymer with wide-ranging applications from cushioning materials to biomedical devices, owes its popularity to its tunable mechanical properties and excellent elasticity. However, like any superhero with an Achilles’ heel, polyurethane isn’t without its weaknesses—especially when exposed to environmental stressors such as oxygen,...