Abstract
Epoxy resin is used for structural engineering applications such as adhesives and matrix of composite materials. However, epoxy resin have one undesirable property with a poor resistance to crack initiation and growth. Recently many attempts have been made to improve in the fracture toughness of epoxy resin by forming interpenetrating polymer network (IPN) with acrylate. In this study, the mechanical properties and the microscopic structure of Epoxy/Acrylate IPN and its glass fiber reinforced plastics (GFRPs) were investigated. The mode I and II interlaminar fracture toughness GIc and GIIc of the GFRP were improved by introducing the IPN into the matrix resin. The shear deformation can be observed on the fracture surface of the epoxy/acrylate matrix composites. The increase in the ductility of the matrix resin would be contributed to the enhancement of the fracture toughness.
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