纤维分子结构与蠕变性能的关系

RELATIONSHIP BETWEEN MOLECULAR STRUCTURE AND CREEP PROPERTIES

测试分析了几种不同纤维的蠕变性能,研究了分子结构对纤维蠕变性能的影响。分析结果表明,超高分子量聚乙烯纤维的蠕变中,普弹形变和高弹形变部分很少,主要为分子间滑移造成的粘流形变部分;而粘胶强力丝、聚丙烯腈炭纤维原丝和高性能涤纶丝的蠕变中粘流形变较少,这是由于分子间的结构差异造成的。

The influence of the molecular structure on creep was studied by means of several different fibers. The experimental results show that, for ultra high molecular weight polyethylene fiber, the viscosity flow caused by intermolecular slip contributes to the main creep elongation while regular elastic deformation and high elastic deformation is very low; for strong viscose rayon, PAN and high tenacity polyester fiber, which hold strong hydrogen bonding and polar group, the viscosity flow during the creep process is much lower. The difference of creep properties for these fibers is close related with the fibers′ molecular structure.