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分别用溶剂法和熔融法成功制备了有机粘土/聚醚砜/环氧树脂杂化纳米复合材料,对其拉伸性能、断裂韧性、热性能和微观结构进行了研究。结果表明:两种杂化纳米复合材料的拉伸强度可达75 MPa以上,模量可达3.0 GPa以上,断裂韧性可达1.1 MPam1/2以上。观察到了聚醚砜和有机粘土对环氧树脂的协同增韧现象。聚醚砜/环氧树脂基体具有半互穿网络结构,有机粘土片层呈有序剥离形态。用溶剂法制备的杂化纳米复合材料样本的玻璃化转变温度(Tg)在170℃以上,用熔融法制备的样本的Tg在180℃以上。
The organic clay / polyethersulfone / epoxy hybrid nanocomposites were successfully prepared by solvent method and melt method, respectively. The tensile properties, fracture toughness, thermal properties and microstructure of the composites were studied. The results show that the tensile strength of the two kinds of hybrid nanocomposites can reach more than 75 MPa, the modulus up to 3.0 GPa and the fracture toughness up to 1.1 MPam1 / 2. Synergistic toughening of polyethersulfone and organoclay on epoxy resins was observed. The polyethersulfone / epoxy matrix has a semi-interpenetrating network structure, and the organic clay layer is in an orderly peeled form. The glass transition temperature (Tg) of the hybrid nanocomposites prepared by solvent method is above 170 ℃, and the Tg of samples prepared by the melting method is above 180 ℃.