纳米CaCO3对PE-HD／CF复合材料力学性能的影响

摘要

针对高密度聚乙烯(PE-HD)／碳纤维(CF)二元复合材料随CF含量的增加，拉伸强度和弯曲强度增大、冲击强度却逐渐下降的情况，在二元体系中添加纳米CaCO3制得PE-HD／CF／CaCO3三元复合材料，对比分析了两种复合材料的力学性能，并采用扫描电子显微镜对三元复合材料的冲击断面进行观察。结果表明，纳米CaCO3的加入使得三元复合材料的拉伸强度略有降低，但弯曲强度和冲击强度在一定范围内增大；当纳米CaCO3含量为10份时，复合材料的综合力学性能最佳。%With the increase of carbon fiber(CF) content in PE-HD/CF composites,the tensile strength and bending strength increased,but the impact strength decreased gradually.To overcome the defect,PE-HD/CF composites was blended with nanometer CaCO3,so PE-HD/CF/CaCO3 ternary composites were obtained.The mechanical properties of PE-HD/CF composites and PE-HD/CF/CaCO3 were analyzed,and the impact fracture surface of ternary composites was observed by SEM. The results showed that the tensile strength of PE-HD/CF/CaCO3 ternary composites reduced slightly than the binary composites,but the bending strength and impact strength increased in a certain range.The ternary composites had the best mechanical properties when nanometer CaCO3 content was 10phr.