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Unsaturated polyester resin (Unsaturated Polyester Resins) is a thermosetting resin, a very important one, is cheap, easy molding, the cured products, light weight and high hardness, etc., are widely used in automotive, construction, appliance, aerospace industry and other fields. But the greatest weaknesses UPR impact resistance after curing and aging ability is poor, especially UV light can cause deterioration of performance of products, thus limiting their application. Fill the UPR elastomeric matrix to improve its toughness, but lower tensile strength, heat resistance, etc. for the price. With the application of nanotechnology and nanomaterials technology development, inorganic nanoparticles toughening UPR, improving the UPR light aging research has important theoretical significance and practical value. In this paper, Universal UPR as matrix, selection of rutile nano-TiO 2 , nano-CeO 2 inorganic nanoparticles as a function of reinforcement, using the most promising industrial applications solution blending method to improve the dispersion of nanoparticles in the UPR behavior, and through a series of casting molding prepared polymer nanocomposites, using SEM, EDS and other technologies for nano-particle dispersion behavior characterization, and mechanical properties of composite materials , thermal stability and light aging systematic study to obtain a good performance expectations UPR-based composite materials, the main research work and the results are as follows: (a) use of mechanical mixing and grinding method, respectively UPR / nano-TiO 2 mixture dispersion treatment under different treatment conditions were tested mixture viscosity, were prepared through the pouring UPR / nano-TiO 2 composites; with SEM, EDS characterization of nano-TiO 2 in the composite particles in the dispersion matrix. Studies have shown that treatment can make the nano-grinding TiO 2 particles in the composite material to achieve a more uniform dispersion, compared with mechanical stirring, the dispersion effect is more pronounced; composite material impact fracture SEM observation showed that nano- TiO 2 section of the composite material to form a step-like toughness fault; viscosity tests show that the grinding 2 h at room temperature can be obtained with good dispersion behavior UPR / nano-TiO 2 mixture, the mixture viscosity test can be used as nano-TiO 2 UPR mixture dispersed in an important characterization methods; nano-TiO 2 particles exist, can significantly improve the matrix UPR mechanical properties, as compared with pure UPR, nano-TiO 2 particle mass fraction of 3.0%, UPR tensile strength and flexural strength were increased by 63.0% and 17.0%; nano-TiO 2 particle mass fraction of 1.0%, the impact strength of the composite material can be increased up 6.1%; TGA tests showed, UPR / nano-TiO 2 composites than pure UPR concerned, a significant enhanced thermal stability. (2) using pre-ground handling UPR / nano-TiO 2 mixtures as raw materials were prepared by hand lay-up process UPR / nano-TiO 2 / glass fiber composite materials. SEM tests show that UPR and nano-TiO 2 and glass fibers with good adhesion; right before and after aging composite mechanical properties and surface FT-IR tests show that the matrix nano-TiO < sub> 2 can improve the UPR light aging resistance, combined with the test results, the aging mechanism. (3) The method of treatment by grinding UPR / nano-CeO 2 mixtures were prepared nano-CeO 2 mass fractions of different UPR / nano-CeO 2 composite materials; SEM, EDS dispersion characterization showed that the grinding time on the nano CeO 2 in the composite dispersion has a significant impact; sectional SEM tests show that for grinding 2 h, nano-CeO 2 mass fraction of 2.0% under the conditions of the composite material, the impact ductile fracture cross section forming a large number of tear tape; mechanical properties of the test showed that, compared with pure resin, the tensile strength, impact strength, flexural strength were increased by 69.5%, 87.8% and 17.8% respectively.
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