The main physical properties of fiber-reinforced composites are derived from fibers. In order for matrix resins to support the fibers, the resins must sufficiently impregnate them so they become strong themselves. As the fiber-supporting resin impregnates the fibers, it fills the spaces between them. If the viscosity of the resin is too high, this impregnation process may take a long time or leave spaces between the fibers. Due to its low viscosity, PDCP can be applied quickly for complete and thorough impregnation of the fibers. Additionally, fractures in fiber-reinforced composite resins mainly occur in the layers between fibers—the resin part. Using high impact resistant PDCP as the matrix resin makes possible the creation of a composite material in which the interlaminar fracture does not progress all at once.