In polymer composites, plastic resins remain as continuous phase, whereas fibers and fillers stay in discontinuous phase to provide reinforcement effects. The composite performance is governed through the interface between the fibers and the polymer matrix. In composite science, the key target is the interface and related interfacial bonding as the stress transfer between the fiber and polymer matrix dictates the overall mechanical performance . As a result, improving the interface of the fibers or polymer matrix (resin) is critical for improving their adhesion to the matrix .