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在选择性激光烧结(SLS)成形中,聚苯乙烯(PS)成形件精度高但其力学性能差,而聚酰胺-12(PA12)成形件力学性能高但其尺寸精度较差.为此,通过添加增容剂合成了PS/PA12合金粉末并用于SLS成形,研究了PS/PA12合金、PS及PA12成形件的力学性能、精度及断口微观形貌.结果表明,PS/PA12合金成形件的拉伸强度、断裂伸长率、冲击强度、弯曲强度及弯曲模量分别是PS成形件的4.72倍、1.94倍、4.92倍、4.57倍及1.37倍;PS/PA12合金粉末成形件在x、y及z方向的尺寸误差比PA12分别降低了46.9%,47.3%及20.3%.说明PS/PA12合金粉末成形件兼顾了PS成形件精度高及PA12成形件力学性能好的优点,具有较高的推广使用价值.

参考文献

[1] H. Chung;S. Das .Processing and properties of glass bead particulate-filled functionally graded Nylon-11 composites produced by selective laser sintering[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(2):226-234.
[2] H. Zarringhalam;N. Hopkinson;N.F. Kamperman;J.J. de Vlieger .Effects of processing on microstructure and properties of SLS Nylon 12[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):172-180.
[3] Haizhong Zheng;Jian Zhang;Shiqiang Lu .Effect of core-shell composite particles on the sintering behavior and properties of nano-Al_2O_3/polystyrene composite prepared by SLS[J].Materials Letters,2006(9/10):1219-1223.
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