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采用SEM观察了热塑性聚芳醚酮(PAEK)共混增韧环氧树脂的浇注体脆断断口相形貌,统计分析了浇注体断口粒子相尺寸与PAEK含量间的关系,测试了浇铸体的冲击韧性(ak)。结果表明:随着PAEK的质量分数从23.1%增加到33.3%,热固性颗粒的粒径由1.59μm减小到0.99μm;树脂浇铸体的ak值在PAEK的质量分数为28.6%时增加到28.06 kJ/m2,然后再减小。在上述结果的基础上,通过有限元分析软件重构了该体系的三维相结构,预测了树脂体系的冲击强度并与实验结果进行了对比,二者相符性较好。
SEM was used to observe the morphology of the brittle fracture surfaces of the cast polytetrafluoroethylene ether (PAEK) toughened epoxy resin. The relationship between the particle size and the PAEK content of the castings was statistically analyzed. Impact toughness (ak). The results showed that with the mass fraction of PAEK increasing from 23.1% to 33.3%, the particle size of thermosetting particles decreased from 1.59μm to 0.99μm. The ak value of resin castings increased to 28.06 kJ with the mass fraction of PAEK being 28.6% / m2, then decrease again. Based on the above results, the three-dimensional phase structure of the system was reconstructed by finite element analysis software, the impact strength of the resin system was predicted and compared with the experimental results, the two are in good agreement.