Dynamic mechanical properties of extruded nylon-wood composites

Dynamic mechanical properties determine the potential end use of a newly developed extruded nylon-wood composite in under-the-hood automobile applications. In this article, the dynamic mechanical properties of extruded nylon-wood composites were characterized using a dynamic mechanical thermal analyzer (DMTA) to determine storage modulus, glass transition temperature (T-g), physical aging effects, long-term performance prediction, and comparisons to similar products. The storage modulus of the nylon-wood composite was found to be more temperature stable than pure nylon 66. The T-g range of the nylon-wood composite was found to be between 23 and 56 degrees C, based on the decrease in storage modulus. A master curve was constructed based on the creep curves at various temperatures from 30 to 80 degrees C. The results show that the relationship between shift factors and temperature follows Arrhenius behavior. Nylon-wood composites have good temperature-dependent properties. Wood fillers reduced the physical aging effects on nylon in the wood composites. The comparison of the nylon-wood composite with other similar products shows that nylon-wood composites are a promising low cost material for industrial applications.