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In this paper, different methods of research and preparation of high density polyethylene (HDPE) plastic composite material base, and its mechanical properties, thermal properties, flow properties and morphology morphology in-depth system. First, the use of wood processing compatibilizer coupling treatment method as polar and non-polar wood fibers between the resin matrix compatibility there is a considerable problem that different aspects of performance composite materials such as a of man, so we use the four kinds of coupling agent to improve the compatibility of composite materials. Studies have shown that coupling to a certain extent, improved composite interface compatibility reinforcements two combined force, thereby enhancing the mechanical properties. Among four kinds of coupling agents, KH560 improve the performance of the material the most effective. However, the coupling agent to improve the compatibility of the material is limited, so we use eight kinds of compatibility agent to further improve the compatibility of wood-plastic composites. Studies have shown that a good compatibility agent can improve the compatibility of the composite materials, among eight kinds of compatibilizer, HDPE-g-MAH to tensile, bending the most effective to improve the performance, which contain a glycidyl methacrylate (GMA) series of ethylene - acrylic ester - glycidyl methacrylate (trade name A800) impact properties of the composite material has a great improvement in their performance and compatibility with the enhancement agent content increases. Scanning electron microscopy (SEM) The results show that adding a compatibilizing agent, the wood is well covered in the polymer matrix surface, makes the material voids reduced. On the other hand, the mechanical properties of composite wood flour content increases with the increase, but the material's processing performance will be poor, dynamic scanning rheological studies show that the viscosity of the composite flour content increases with increasing sharply . In addition, DSC results showed that the wood powder in the composite system can play the role of nuclei, HDPE promote better and more regular crystallization, so that the material has better mechanical properties. Secondly, the paper also prepared in situ reactive extrusion out of the performance is more excellent wood-plastic composites, and then added directly compatible with the traditional method agents were compared and studied the reaction of monomer, initiator concentration and Catalysts on the mechanical properties of composite materials, thermal properties, water absorption and morphological structure. Experimental results show that in-situ reactive extrusion method in the preparation of more efficient wood-plastic composite materials, the material of the performance is better. Compatibilization via in situ reaction, the material of the mechanical performance has been a very significant increase, to further reduce water absorption, SEM results showed that the gap cross-situ compatibilization of the material after reduction, the fiber arrangement in the system more compact, reinforced composite dimensional stability of the material. Finally, this paper also studies a reactive liquid plasticizer with the composite effect of the use of the special nature of the liquid plasticizer to increase the added amount of wood in the mechanical properties of composite materials to ensure at the same time , reducing the cost of the composite material, to improve the processing performance of materials, expanded use of the material, to achieve the purpose of the present research.
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