摘要
试探性地利用选区激光烧结制备PS/Al2O3纳米复合材料,利用乳液聚合方法改性纳米Al2O3,并在相同工艺条件下对PS/Al2O3纳米复合材料成型粉末(NH1)与纯聚苯乙烯(PS)粉末选区激光烧结试样的力学性能进行了比较.结果表明,NH1烧结试样(PS/Al2O3纳米复合材料)较纯PS的拉伸强度提高了2倍左右,最大值达到29.8MPa;缺口冲击强度提高了20%～50%,最大值达到10.5 kJ/m2;洛氏硬度仅增加约5%;并利用场发射扫描电子显微镜对试样的冲击断面进行了微观结构分析,发现纳米Al2O3经乳液聚合改性后在基体中分散良好,起到很好的增强增韧作用.
Al2O3/PS nanocomposites was prepared by selective laser sintering （SLS） . The nano-Al2O3 particle was modified bv emulsion polymerization, and the mechanical properties of polystyene（PS） powder sintered parts were compared with that of PS/ Al2O3 nanocomposite molding powder（ NHI ） sintered parts at the same process conditions, The results showed that the tensile strength of NH1 sintered parts was up to 29.8 MPa, which was twice as much as PS sintcred parts. And the notched impact strength of NHI sintered parts was up to 10.5 kJ/m^2 , which was 20% - 50% higher than that of PS sintered parts, but the Rockwell hardness increased 5% only. The FE-SEM micrograph analysis results showed that the nano-Al2O3 modified by emulsion polymerization dispersed well in matrix, and it served the function of toughening and strengthening.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2005年第9期28-31,共4页
Engineering Plastics Application
基金
江西省自然科学基金资助项目(0550098)
江西省材料科学与工程研究中心基金资助项目(ZX200301020)
南昌航空工业学院基金资助项目(EC200401021)
