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采用一步法制备EVA/TiO2纳米复合材料,应用FESEM和SEM方法研究分散状态和断面形貌,并测试纳米复合材料的力学性能。进一步利用均匀化理论和有限元相结合的方法模拟EVA/TiO2纳米复合材料的有效性能。结果表明:纳米TiO2微粒在EVA基体中分散良好,拉伸强度、断裂伸长率和弹性模量均有所提高,起到了增强增韧作用;填充圆形和方形TiO2颗粒的复合材料有效性能,均随填充量的增加而增加;同一填充量时,填充颗粒为方形的大于填充颗粒为圆形的材料的有效性能;等效弹性模量与实验所得的结果基本趋势一致,圆形颗粒的计算结果更接近实验结果。
The one-step method was used to prepare EVA / TiO2 nanocomposites. FESEM and SEM were used to study the dispersion state and cross-section morphology. The mechanical properties of nanocomposites were also tested. The homogeneity theory and finite element method are further used to simulate the effective properties of EVA / TiO2 nanocomposites. The results show that nano-TiO2 particles disperse well in EVA matrix, tensile strength, elongation at break and modulus of elasticity increase, which enhances the toughening effect. The effective performance of the composite filled with round and square TiO2 particles, Both increase with the increase of the filling amount; when the same filling amount, the filled particles are larger than the effective performance of the material filled with round particles; the equivalent elastic modulus and the experimental results basically the same trend, the calculation of circular particles The result is closer to the experimental result.