Structure and Property Relationships of Poly (P-Phenylene Terephthalamide) Fibers

摘要

To conserve energy, high performance, fiber-epoxy composites are increasingly used by the transportation industry as light-weight, strong, structural materials. In the past either graphite, glass, or boron fibers predominantly were used in these composites. However, the incorporation of high-modulus poly (P-phenylene terephthalamide) (PPTA) fibers (Kevlar 49 exp + , E.I. du Pont) in these composites can increase the energy needed to fracture them, because they exhibit larger ultimate elongations (approx. 3 to 4%) relative to boron or graphite fibers (