Energy absorption properties of wood flour/polypropylene foamed composites

Wood flour/polypropylene foamed composites with different content of wood flour were prepared using compression molding.The energy absorption properties of these foamed composites were investigated by the tests of static compression, cycle compression, compression creep and dynamic thermal mechanical analysis. The results show that properties such as energy absorbing capacity, energy absorbing efficiency parameter, the relaxation rate, circulation loss quantity, dynamic mechanical properties of foamed composites all first increase then decrease following with wood flour increasing. When the wood flour mass ratio is 30%, the energy absorption properties of foamed composites are the best.