采用可视化装置观察芳纶纤维(AF)填充聚丙烯(PP)化学发泡过程,系统地研究了AF含量及纤维改性对化学发泡PP发泡行为的影响。结果表明:在PP发泡过程中,泡孔的不规整度随AF含量的增加而增大,并且泡孔的生长均受到AF的限制,导致泡孔发生形变,同时表现出明显的沿着平行于AF的方向生长的规律;经表面改性的AF能有效抑制泡孔沿纤维表面的迁移生长,在进入泡孔的过程中,泡孔呈现出先变形后恢复的规律。 A visualization device was used to observe the chemical foaming process of aramid fiber (AF) -filled polypropylene (PP). The effects of AF content and fiber modification on the foaming behavior of PP were studied systematically. The results showed that the irregularities of the cells increased with the increase of the content of AF in the process of PP foaming, and the growth of the cells was restricted by AF, which resulted in the cell deforming and obvious parallelism AF in the direction of the growth of the rule; the surface modification of AF can effectively inhibit cell migration along the fiber surface growth in the process of entering the cell, the cell showed a deformation after the recovery of the law.