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基于选区激光烧结的无机纳米Al₂O₃粒子增强增韧聚苯乙烯的研究

Study of PS Strengthened and Toughened by Nano-Al₂O₃ Based on Selective Laser Sintering Technology

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【Author】 XU Zhi-feng,ZHANG Jian, ZHENG Hai-zhong, ZHENG Yu-hui,HUANG Yin-hui (Materials Department, Nanchang Institute of Aeronautical Technology, Nanchang 330034,China;College of Mechanic and Electric Engineering,Nanjing University of Aeronautics & Astronautic, Nanjing 210016,China)

【机构】南昌航空工业学院材料学院；南京航空航天大学机电工程学院江苏南京 210016；南京航空航天大学机电工程学院；江西南昌 330034；江苏南京 210016；

【摘要】基于选区激光烧结(SLS)技术,进行了无机纳米Al2O3粒子改性聚苯乙烯(PS)的试验研究。结果表明,在一定的激光烧结工艺参数条件下,激光烧结件中的纳米Al2O3粒子在PS基体中分布均匀,且其冲击强度、拉伸强度最大分别达到了12.1 kJ／m2和31．2 MPa,相对于纯PS烧结件提高了60％和380％。同时,冲击断面SEM显示其属典型的韧性断裂,无机纳米Al2O3粒子起到了增强增韧PS的作用。更多还原

【Abstract】 Polystyrene was reinforced with nano-sized inorganic Al2O3 particles using selective laser sintering technology. The Al2O3 particles were found uniformly distributed in polystyrene matrix, resulted in an impact strength of 12.1 kJ/m2 and a tensile strength of 31.2 MPa, which were 60 % and 380 % higher than those of the sintered part of neat PS. SEM showed layer slipping and fiber deforming on the impact fracture surfaces.更多还原