Research On The Interfacial Compatibility Of Recycled Wood-plastics Composites

To improve the interfacial compatibility of the recycled wood-plastic composites(RWPC), high density polyethylene(HDPE)and the recycled wood fibre which was treated by different surface treatments were mixed and extruded into pellets. Samples for tensile, impact, melt flowing ratio test and infrared ray analysis were prepared. The impact fracture surface was observed by scanning electron microscopy(SEM).The results showed that either alkaline treatment, silane treatment or alkaline/silane treatment can improve the tensile, flexural and impact performance of RWPC. Alkaline/silane treatment is the best method. The SEM analysis showed that after alkaline/silane treatment, a good interface of the wood fibre and HDPE was obtained which improved the integrated properties of RWPC.To further improve the integrated properties of RWPC, the recycled rubber powder and the glass fibre were introduced into RWPC. The research results showed that with the increase of the quantity of recycled rubber powder, the impact strength increased, and the elongation ratio at break is better than that with no recycled rubber powder, but the tensile strength dropped down. RWPC with the quantity of recycled rubber powder of 15% and the particle diameter of 120 mesh possessed the best integrated properties. Glass fibre resulted in improvement of the property of the RWPC. When the quantity of glass fibre is 4%, the property of the RWPC is the best one. With the increase of the quantity of recycled rubber powder and glass fibre, the melt flowing rate decreased, and the processing of the RWPC became more and more difficulty.