The Research Of Wood-Plastic Composite Based On Acrylonitrile-Butadiene-Styrene Copolymer

Wood-Plastic composites (WPCs) are extensively applied to several realm instead of timber, which embodied the valid application of rebirth resources. Comparing with timber, wood Plastic composites have less hot flexibility and water absorbability, excellent sizes stability, anti-bacteria corrosion, convenient usage and maintainability. Acrylonitrile-Butadiene-Styrene copolymer (ABS) with low creep and excellent dimensional stability and high impact strength, widely used in electronic appliances, instrumentation, automotive, building materials industry, etc. areas. Development of ABS-based WPC can expand the processing of WPC applications, it is important to search alternative materials for wood, it is also a effective way to recycle ABS.In this thesis, a melt-grafting method was used to prepare maleic anhydride grafting peroxide resins (C9-g-MAH). The effects of dicumyl peroxide (DCP), maleic anhydride (MAH), as well as the variety and the dosage of third monomer on the grafting ratio of C9-g-MAH. The addition of C9-g-MAH and several processing agents can increase processing and mechanical properties of the composites. Research the effect of wood modified by silane coupling agent on the processing and mechanical properties of WPC. Traditional test methods and some modern analytical techniques, i.e. infrared spectroscopy(FT-IR), scanning electron microscopy (SEM), were used to monitor the effect of additives on structure characteristics and physical-mechanical properties of ABS-absd WPCs. The results were showed below:(1) The melt grafting of maleic anhydride(MAH) on to C9 petroleum resin was initiated in a torque rheometer at 115℃. The introduction of an appropriate amount of TAIC or CNSL as third monomer in melt grafting reaction can effectively improve the C9-g-MAH Grafting degree (GD), the effect of using CNSL more obvious than using TAIC; Initially increased GD to maximum, and then deceased with increasing MAH and DCP concentration. When the content of DCP and MAH separate were 0.2phr and 3.0phr base on the C9-petroleum resin and the addition of CNSL at 4.0phr significantly increased the GD of C9-g-MAH and the GD reached the maximum 4.37%;(2) By investigating the effects of C9-g-MAH on the properties of WPCs, it had been found that the suitable amount of C9-g-MAH can obviously enhance tensile strength, flexural strength, impact strength and rheo logical properties of the composites, compared with the non-modified C9, in which the level of increase and the C9-g-MAH graft ratio has a good relationship;(3) Different types and different content of processing agents have a certain influence on the tensile strength, impact strength, flexural strength of WPCs. When adding 3.0phr RX-80, WPCs has the maximum tensile strength and flexural strength by improving the wood flour dispersion and enhancing the wood flour-matrix interfacial adhesion; Its impact strength can be improved to 10.2MPa by adding 3.0phr ACR; Better rheo logical properties were revising because of using of 3.0phr CNSL and 3.0phr WB-16.(4) Wood flour modified by the KH-550 and KH-560, the mechanical properties and rheological properties of WPCs have been obviously improved; In comparison of modified of wood flour, it is more economical and easier processing when WPCs were prepared by directly added processing agents.