Effects of Temperature and Nano-filler Content on Water Uptake in Nanocomposites

In this study, water absorption behavior of metal-feeling composite based on polyamide 6 and polyamide 6/montmorillonite (MMT) was investigated under various humidity conditions. The initial behavior of water absorption of the nanocomposites was linearly proportional to the square root of time. As a result, the diffusion coefficient decreased with increasing MMT contents and decreasing the condition temperature. It was confirmed that the water absorption temperature played more significant role than MMT content for the diffusion coefficient. Furthermore, as MMT content increased, storage modulus was increased. This reduced humidity-induced relaxation of nanocomposite at the high temperature.