扫描电子显微镜研究聚丙烯腈纤维的织态结构和缺陷

<正> 碳纤维的性能与所用原料聚丙烯腈(PAN)纤维的质量有密切关系.特别是PAN纤维的织态结构(包括各级的超分子结构)及其缺陷对碳纤维的结构和性能有很大影响.PAN纤维的结构特征与纺丝工艺条件有密切关系.但用扫描电子显微镜(SEM)研

INVESTIGATION OF TEXTURE-STRUCTURE AND THE DEFECT OF ACRYLIC FIBER BY SEM

The texture-structure and defect of the wet-spun acrylic fiber have been investigated by scanning electron microscopy (SEM). The existence of a multiple fibril-pore type of structure has been established in highly stretched wet-spun acrylic fiber. The fibrils are well oriented in the direction of the fiber axis, and the pores are elongated in the same direction. The texture of the broken surface of this acrylic fiber shows fracture with axial splitting. This machanism of the fracture involves both separation and rupture of the fibrils. Morphological characteristics of the defect in acrylic fiber have been analyzed.