使用马来酸酐(MAH)对芳纶纤维(AFs)进行刻蚀处理,以期改善其与尼龙6(PA6)的界面相容性,进而提高 AFs/PA6复合材料的力学性能。将不同时间梯度处理后的 AFs 与 PA6经均匀共混、注塑制成 AFs/PA6复合材料标准试样。采用 FE-SEM、XPS、XRD和DSC研究了 AFs 表面形貌和元素含量以及 AFs/PA6复合材料的冲击断面形貌、晶型、晶粒和结晶度。结果表明：经过3 h 的刻蚀,AFs 表面粗糙程度最大且表面含氧量最高。刻蚀AFs的加入有利于PA6晶粒细化并且形成α晶型。相对于纯PA6,AFs/PA6复合材料试样的内部更易形成α晶型,同时结晶度也得到提高。加入经表面处理的AFs有利于提高AFs/PA6复合材料的拉伸强度和弯曲强度,当加入刻蚀时间为3 h的 AFs时,AFs/PA6复合材料的力学性能达到最佳。
Maleic anhydride (MAH)was used to corrode aramid fibers (AFs)in order to improve the interfacial compatibility between AFs and polyamide 6 (PA6)and increase the mechanical properties of AFs/PA6 composites. PA6 was mixed with AFs treated with different time gradients uniformly and the standard samples of AFs/PA6 composites were inj ection molded.FE-SEM,XPS,XRD and DSC were used to study the surface morphologies and element contents of AFs and the impact fracture surface morphologies,crystal form,grain and crystallinities of AFs/PA6 composites.The results show that surface roughness and surface oxygen content of AFs reach the maxi-mum after corrosion for 3 h.The introduction of corroded AFs is beneficial for PA6 to refine grains and formαcrys-tal.The inner of AFs/PA6 composite samples tend to formαcrystal easily and the crystallinity has been improved compared with PA6.AFs/PA6 composites have higher tensile strength and bending strength after the addition of surface treated AFs,and mechanical properties of AFs/PA6 composites achieve maximum value when AFs are cor-roded for 3 h.
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