Water sorption and mechanical properties of a glass-reinforced polyester resin

Abstract A mechanical and calorimetric analysis was performed on a glass fibre-reinforced polyester resin aged in water at different temperatures. Data were compared for the dry and aged matrix and composites. The exposure of the resin and composite to water at different temperatures induced modifications in the mechanical properties and the morphology of the polymeric samples. The loss of low molecular weight components initially present in the resin, plays an important role in the embrittlement of the samples.