STUDY ON INTERFACE MODIFICATION OF F-12/EPOXY COMPOSITE BY GRAFTING-COUPLING AGENT
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摘要: 采用一种大分子接枝偶联剂对F-12 纤维表面进行等离子体接枝改性, 并采用ESCA 对改性后的纤维表面进行分析, 研究了接枝偶联剂的分子量和浓度对F-12/环氧复合材料横向拉伸强度的影响, 并结合横向拉伸的断口对改性机理进行了分析。实验结果表明: 接枝偶联剂接枝改性以后, 能够有效地改善F-12/环氧复合材料的界面结合状态, 从而提高复合材料的横向拉伸强度。Abstract: The surface of F-12 fiber is modified by plasma grafting a kind of macromolecule grafting coupling agent. Based on the analysis of the modified surface of fiber by ESCA, the effects of molecular weight and concentration of grafting coupling agent on the transverse tensile strength are investigated, and the modification mechanism is analyzed according to fracture of transverse tensile. Results show that the grafting modification of grafting coupling agent can effectively improve the interfacial bond properties of F-12/ epoxy composite, and therefore increases the interlaminar shear strength and transverse tensile strength thereof.
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Key words:
- aramid fiber /
- composite /
- surface modification /
- cold plasma
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