改性聚芳醚酮增韧环氧树脂研究

Study on modified polyaryletherketone toughening epoxy

以改性聚芳醚酮(PAEK)为增韧剂对环氧树脂进行改性。通过冷场发射扫描电镜分析和冲击强度测试研究了PEAK用量对PAEK/EPOXY浇注体冲击性能的影响及其增韧机理。结果表明,纯环氧和质量分数分别为5%、15%、25%、35%和50%的6种共混浇铸体的冲击强度分别为1.92 MPa、2.97 MPa、3.06 MPa、4.63MPa、4.69 MPa以及5.36 MPa,体系的冲击强度随PAEK含量增加而提高。随PAEK用量增加,PAEK/EPOXY共混体系主体呈现为海岛-双连续相-相反转逐步过渡微观结构,这影响了共混树脂体系的冲击裂纹扩展模式,从而使得冲击性能上升。

The epoxy resin was modified using modified polyaryletherketone （PAEK） as toughening agents. The effect of PEAK amount on the impact properties of PAEK / EPOXY castings and the toughening mechanism were investigated by impact strength tests and cold field emission scanning electron microscopy. The results showed that the impact strength of pure epoxy castings and castings with PEAK mass fraction of 5% , 15% , 25% , 35% and 50% were 1.92 MPa, 2. 97 MPa, 3.06 MPa, 4.63 MPa, 4.69 MPa and 5.36 MPa, respectively. The impact strength of the system was increased with the PAEK amount increasesing. With the increase of PAEK amount, PAEK/EPOXY blend body rendered as islands - bicontinuous phase - inversion gradual transition microstructure, which affects the impact crack propagation mode of blend resin system, so that the impact properties were in- creased.