MC尼龙/纳米Al_2O_3复合材料力学性能的研究

STUDY ON MECHANICAL PROPERTY OF MC NYLON/NANO-Al_2O_3 COMPOSITE

采用原位聚合技术制备了纳米Al2 O3 增强单体浇铸 (MC)尼龙复合材料 ,用扫描电子显微镜观察其断口形貌及纳米粒子分布状况 ,并测试、分析了纳米Al2 O3 含量对材料力学性能的影响。结果表明 ,采用原位聚合技术可获得纳米粒子分布均匀、综合性能优良的纳米复合材料 ,当纳米Al2 O3 质量分数为 4 %时 ,MC尼龙 /纳米Al2 O3 复合材料的拉伸强度、冲击强度和弯曲强度均达到最大值 ,分别比纯MC尼龙提高了 19%、33%和 11%。

MC nylon/nano-Al 2O 3 composites were prepared by in situ polymerization. Through scanning electron microscope, the nano-composites fructure morphology and nano-particle distribution were observed. The effects of nano-Al 2O 3 content on the mechanical properties of composites were analyzed. The results showed that the nano-composites of well dispersed particles and good integrative properties were obtained by in situ polymerization. And the tensile strength, impact strength, and flexural strength of MC nylon/nano-Al 2O 3 composites reached the maximum which were 119%, 133%, and 111% higher respectively than those of pure MC nylon, in the case of 4% nano-Al 2O 3 particles.