Repair of Aerospace Composite Structures Using Liquid Thermoplastic Resin.In this study, two types of carbon-fiber-reinforced plastic (CFRP) composite scarf geometries were created using two scarf angles, i.e., 1.43° and 5.71°.  The scarf joints were adhesively bonded using a novel liquid thermoplastic resin at two different temperatures.  The thermal stability of the resin was evaluated by thermogravimetric analysis (TGA), whereas the stiffness of the pristine samples was determined using dynamic mechanical analysis (DMA).  The residual strength recovered using liquid thermoplastic resin was found to be much higher than that reported for conventional epoxy adhesives.
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