Composite polymers, which are Nylon6 matrix homogeneously dispersed with aluminum powders, are prepared. To evaluate the brittleness, Charpy impact values are obtained. Although an aluminum addition of 10 vol tremendously decreases the impact value, excess aluminum additions from 30 to 40 vol don't largely decrease the impact value. It is explained that cracks easily propagate through the interface between the aluminum powders and polymer matrix because of the weak interface.

Keywords: aluminum powders, nylon6 polymer, composite polymeric material, water absorption, Charpy impact test