Effects of Water Absorption on Impact Value of Aluminum Dispersed Composite Nylon6

Abstract

Composite polymers, which are nylon6 materials with aluminum powders dispersed homogeneously, are prepared. Influences of water absorption on Charpy impact value of composite polymers have been investigated. Although the aluminum dispersion from zero to 40 vol%Al decreases the impact value, the water absorbing treatment for 105 s at boiling point largely increases the impact values of all composite polymers. It is explained that water molecules in nylon6 mainly relaxes the impact force. If the water absorption also enhances the interfacial energy to form the crack in nylon6 and its composites, the high impact value with smooth undulating surface can be explained. © 2009 The Japan Institute of Metals.