Influence of fiber/matrix interface properties on the performance of fiber reinforced polymer composites

Fiber reinforced polymer composites (FRPCs) comprising fibers and a polymer matrix exhibit complex properties beyond a simple combination of these components. The transfer of stress from the matrix to fibers occurs at the interface, where interfacial adhesion influences this process. Characterizing the quality of fiber/matrix interfaces is a key factor to check the compatibility bonding. For FRPCs facing poor fiber-matrix bonding, some methods are developed. Understanding interface effects is vital for optimizing composite properties, including mechanical, corrosion resistance, energy absorption, and rheological properties, influencing composite design, material selection, processing, applications, and development. This chapter covers fundamental concepts, characterization methods, improvement strategies, and modeling approaches in this field.