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Reactive extrusion as a polymer reactive processing technology, the chemical reaction of the polymer and polymer extrusion processing combine into a complete continuous process, is an ascendant interdisciplinary. This paper introduces the principle of reactive extrusion technology as well as equipment, reaction kinetics, heat transfer equation. By reactive extrusion technology to prepare PP-g-MAH and its successful application to the modified polypropylene. With Qilu Petrochemical Company production of polypropylene the T30S, through theoretical analysis and test selected graft monomer to MAH, study monomer content of the performance of the PP-g-MAH; by initiator decomposition temperature, the activation energy and the grafting process the analysis of the DSC curve, select the the initiator DCP, examine the amount of initiator impact on the performance of the PP-g-MAH; reasonable formulations and processing conditions on orthogonal experiment method; equipment extrusion reaction. Screw aspect ratio intermeshing co-rotating twin-screw extruder reaction best; using polarized light microscopy, DSC and WAXD analysis of the performance of its crystalline, found that polypropylene grafted MAH (PP-g-MAH ), lower melting point, degree of crystallinity and crystallization temperature increased, but before and after grafting polymorphs of the main chain without fundamental changes; rheological properties of PP-g-MAH analysis results show that, PP-g-MAH is a fake plastic fluid, with increasing shear rate, the viscosity decreases, the shear stress increases, PP-g-MAH pseudoplastic weak than pure PP, PP-g-MAH is not sensitive to temperature changes, only the shear sensitive, its application to help to improve the processing performance of the material in the polymer composite material. Analysis of the product's appearance, density, flow properties, and graft rate, compared with the domestic and foreign products, self-developed products have reached the technical level of similar products at home and abroad. PP-g-MAH modified polypropylene wood fiber applications. PP-g-MAH liquidity and grafting ratio of wood fiber / polypropylene composite bending performance a great impact, PP-g-MAH appropriate liquidity to ensure good bending performance composite; join PP -g-MAH, the increased mobility of the composite material, improve the tensile strength, elongation at break decreased; gradually increased with the increase of the amount of PP-g-MAH, flexural strength, flexural modulus is increased to a certain value, tends smooth; impact strength with the increase in the amount of PP-g-MAH, first increased, decreased rapidly after; better than the effect with other surface-treating agent and used alone or PP-g-MAH; adding PP-g-MAH, melt of shear stress and viscosity slightly increased, but the increase in the amount of PP-g-MAH, the rheological behavior of the system is not changed; This shows that adding a suitable amount of PP-g-MAH, the compatibility of the matrix and the filler to be improved, The interfacial bond strength improved. Judging from the SEM photographs of the system without PP-g-MAH, wood fiber and polypropylene phase more obvious smooth interface. After adding the surface treatment agent to improve the two-phase interface base
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