黄麻纤维增强聚酯复合材料的制备与力学性能
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摘要
以二维编织结构的黄麻纤维为增强体,以不饱和聚酯为基体树脂,通过模压工艺制备黄麻纤维/聚酯复合材料,考查了模压压力和温度等条件对复合材料力学性能的影响。结果表明:随着模压压力的升高,复合材料的力学性能呈增大趋势;在相同模压压力下,低温条件下的力学性能优于高温。在考查范围内,当模压温度为30℃,压力为6 MPa时复合材料的力学性能最好。扫描电镜观察材料内部结构显示,高温条件下制备的复合材料中存在大量气孔,影响力学性能;在相同温度下,压力越大复合材料中纤维与基体树脂的结合越紧密。
The jute fiber/polyester composite was prepared by molding process, using two-dimensional braided jute fiber as the reinforcement and unsaturated polyester as the matrix resin. The effects of molding pressure and temperature on the mechanical properties of the composite were investigated. The mechanical properties of the composites increase with the increase of the molding pressure. Under the same molding pressure, the mechanical properties at low temperatures are better than the high temperatures. In the scope of investigation, the mechanical properties of the composites are best, when the molding temperature is 30 ℃ and the pressure is 6 MPa. The internal structure of the material was observed by scanning electron microscopy. The composites prepared under high temperature conditions have a large number of pores, which affects the mechanical properties. At the same temperature, the higher the pressure is, the closer the combination of fibers and matrix resin are in the composite.
The jute fiber/polyester composite was prepared by molding process, using two-dimensional braided jute fiber as the reinforcement and unsaturated polyester as the matrix resin. The effects of molding pressure and temperature on the mechanical properties of the composite were investigated. The mechanical properties of the composites increase with the increase of the molding pressure. Under the same molding pressure, the mechanical properties at low temperatures are better than the high temperatures. In the scope of investigation, the mechanical properties of the composites are best, when the molding temperature is 30 ℃ and the pressure is 6 MPa. The internal structure of the material was observed by scanning electron microscopy. The composites prepared under high temperature conditions have a large number of pores, which affects the mechanical properties. At the same temperature, the higher the pressure is, the closer the combination of fibers and matrix resin are in the composite.
引文
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