Decrease of mechanical properties of thermoplastic matrix composites afterimmersion in a hydrogen peroxide solution

The evolution of the mechanical properties, static and dynamic, of two diff erent composites with thermoplastic matrix and glass-fi er fabric or carbon -fiber fabric as reinforcement after immersing in a hydrogen peroxide solut ion have been analyzed. The tensile strength Suffered a decrease after expo sure of the materials in the solution. This decrease was more important in the case of the glass-fiber composite than in carbon,fiber composite, On th e other hand, the interlaminar shear strength suffered also an important de crease, but in this case more substantial for the carbon-fiber composite, F inally, the fatigue behavior of the materials have been studied after expos ure to the hydrogen peroxide Solution. The results correlate with the tensi le results.