PARTICLE-TOUGHENED FIBER-REINFORCED POLYMER COMPOSITES

摘要

Particle toughened, fiber-rein-forced composites include a fiber region and an interlayer region between the fibers. The fiber region includes a plurality of fibers at least partially within a first polymer composi-tion including a first base polymer formula-tion and a first plurality of toughening parti-cles. The interlayer region includes a second polymer composition including a second base polymer formulation and at least one of the first plurality of toughening particles and a second plurality of toughening particles. Ex-amples of first and second pluralities of toughening particles, respectively, may in-clude core shell rubbers and polyimides. In-creasing concentration of the first plurality of toughening particles may improve the com-posite toughness while preserving thermal properties of the composite, such as weight loss after extended duration exposure to ele-vated temperature. It is further discovered that the relative placement of the toughening particles influences composite mechanical properties, such as compression after impact (CAI) strength.