摘要:
为改善石墨纤维/ 双酚A 二氰酸酯(M40J / BADCy) 复合材料的层间剪切强度, 采用立体四针状ZnO晶须对M40J / BADCy 复合材料进行增强。红外光谱及凝胶实验研究表明, ZnO 晶须对BADCy 的固化反应有催化作用, 使BADCy/ E51 树脂体系的后固化温度由200 ℃降为180 ℃。力学性能测试表明, 未处理的ZnO 晶须因与BADCy 基体粘结不好, 仅使M40J / BADCy 复合材料的弯曲模量有所提高。经KH560 处理的ZnO 晶须对M40J / BADCy 复合材料的层间剪切强度提高明显, ZnO 晶须含量为10 %时, 增强效果最佳, 使M40J / BADCy复合材料的层间剪切强度由原来的77.6 MPa 提高到91.2 MPa , 弯曲模量由原来的178.9 GPa 提高到207.4GPa , 而弯曲强度变化不大。SEM 研究表明, 立体结构的晶须能很好地分散于M40J / BADCy 复合材料层间, 依靠晶须的层间“钉扎”提高复合材料的层间剪切强度。
Abstract:
ZnO whisker , which possesses stereoscopic st ructure , was int roduced into M40J / bisphenol-A dicyanate(BADCy) composite to improve it s ILSS1 The reaction mechanisms of BADCy blend with epoxy resin E51 and ZnOwhisker were studied by FTIR spect roscopy1 It was found that ZnO whisker serves as a catalyst of polycyclot rimerize reaction of BADCy , and post-cure temperature of BADCy/ E51 blend system was descended from 200 ℃ to180 ℃. The result s indicated that when 10 % ZnO whisker t reated by KH560 is int roduced , the ILSS and flexuralmodulus of M40J / BADCy composite could improve from 77.6 MPa and 178.9 GPa to 91.2 MPa and 207.4 GPa respectively , while with the unt reated ZnO whisker they are improved only slightly. The SEM analysis of f racture surfaces of broken specimens indicates that the ILSS and flexural modulus of M40J / BADCy composite were improvedby means of the“nail”of ZnO whisker in the laminar of M40J / BADCy composite.
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