The Foaming Process Of EVA Modified Wood/Recycle-Polyethylene Composite

Preparation of wood plastic composites (WPC) is of great significance to seek alternative materials of wood, and its effective way to realize plastic recy(?)ling. In this paper, profound research is given on surface modification of woo(?), preparing process of foaming materials and performances of the recycle polyethylene wood plastic composite.Main results are listed blow:1. A novel method is employed to improve the compatibility between woo(?) and olefin resin by using ethane-EVA .Test of FTIR shows that after the surface modification by EVA, chemical polarity of natural wood surface is reduced. Test of TG shows that thermal stability of treated wood-flour is higher than the untreated one by adding EVA. SEM shows that when the EVA mass content is 15 wt%, the wood-flour was completely encapsulated.2. Foamed WPC is made by treated wood-flour with EVA and recycle-PE. The test of the material shows that EVA can improve the mechanical property. SEM test shows that EVA can increase the consistent between the wood-flour and polymer. The principle of EVA in foaming process of wood plastic material, and the theoretical model are established.3. The relationship between processing parameters and mechanical properties of the material was studied. Qualified products are prepared by defining the technological conditions and parameters during foaming process.4. A-shaped model of wood plastic compounding material is established for the stress and strain analysis by FEM software Ansys. Flexing of simple beam made of this material shows that it can be substitute of wood in the condition of compression stress and simple beam.