Abstract In view of the limitation of wide application of polypropylene(PP) with low strength, poor low-temperature brittleness and easy combustion, a kind of PP matrix nanocomposites was designed and prepared. Sb2O3 nanoparticles (nano-Sb2O3) modified by silane coupling agent of KH550 were dispersed into brominated polystyrene(BPS)-PP matrix by ball milling dispersion and melt blending method, respectively. And the nano-Sb2O3/BPS-PP composites samples were obtained by injection molding method. The effects of nano-Sb2O3 particles on mechanical properties of nano-Sb2O3/BPS-PP composites were investigated. The results showed that the surface of nano-Sb2O3 particles was successfully modified by the KH550 and the interfacial adhesion between nano-Sb2O3 and PP matrix was improved. With increasing of the mass fraction of nano-Sb2O3, the tensile strength and impact strength of nano-Sb2O3/BPS-PP composites were improved accompanying by increasing of crystallinity and refining grain of the composites. When the mass fraction of nano-Sb2O3 was 3 wt%, the tensile strength of nano-Sb2O3/BPS-PP composites was 43 MPa, which was 30.3% higher than that of PP. When the mass fraction of nano-Sb2O3 was 2 wt%, the impact strength of the composites was 44.19 kJ·m−2, which was 30.8% higher than that of PP.

中文翻译：

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纳米Sb2O3/BPS-PP复合材料的合成及力学性能

摘要 针对聚丙烯(PP)强度低、低温脆性差、易燃烧等特点限制了其广泛应用，设计制备了一种PP基纳米复合材料。KH550硅烷偶联剂改性的Sb2O3纳米颗粒(nano-Sb2O3)分别通过球磨分散和熔融共混法分散到溴化聚苯乙烯(BPS)-PP基体中。并通过注射成型方法获得纳米Sb2O3/BPS-PP复合材料样品。研究了纳米Sb2O3颗粒对纳米Sb2O3/BPS-PP复合材料力学性能的影响。结果表明，KH550成功修饰了纳米Sb2O3颗粒的表面，提高了纳米Sb2O3与PP基体的界面附着力。随着纳米 Sb2O3 质量分数的增加，随着复合材料结晶度的提高和晶粒细化，纳米Sb2O3/BPS-PP复合材料的拉伸强度和冲击强度均有所提高。当纳米Sb2O3的质量分数为3 wt%时，纳米Sb2O3/BPS-PP复合材料的拉伸强度为43 MPa，比PP高30.3%。当纳米Sb2O3的质量分数为2 wt%时，复合材料的冲击强度为44.19 kJ·m-2，比PP提高30.8%。