对位芳纶纤维微热力学性能研究

Para Aramid Fiber Micro Mechanics Property Analysis

本文以国产对位芳纶纤维和美国杜邦Keylar49纤维为实验材料，通过电镜（SEH）对纤维的形貌进行了观察．并由红外光谱和粘度的检测并计算其聚合度，比较分子结构的差异。同时对两种对位芳纶纤维进行热力学性能测试。比较两种纤维的热力学性能。研究表明国产对位芳纶纤维和KeVlar49纤维横截面为均匀几何圆形．KeVlar49纤维纵向有沟槽明显。横截面有锯齿边的异形截面，且两种纤维的化学结构成分相同．但国产对位芳纶纤维的分子量和聚合度均低于KeVlar49纤维。同时热力学性能实验也得出KeVlar49纤维比国产对位芳纶纤维具有更好的力学性能，并从分子结构上进行了分析。

This article mainly domestic para aramid fiber and the United States DuPont fiber Kevlar49 as experimental material, through transmission electron microscopy （ SEM ） on the fiber morphology was observed by infrared spectroscopy, and the viscosity of the measurement and calculation of the degree of polymerization, comparative molecular structure differences. The two para aramid fiber thermodynamic performance test, comparison of two kinds of fiber themmdynamic performance. Research shows that domestic para aramid fiber and Kevlar49 fiber cross section geometry for uniform circular, Kevlar49 fiber longitudinal grooves are obvious, cross section with a serrated edge section, and the two fiber chemical structure composition is same, but homebred contraposition aramid fiber molecular weight and degree of polymerization were lower than those of Kevlar49 fiber. At the same time thermodynamic performance experiment that Kevlar49 fiber than domestic para aramid fiber has better mechanical properties, and from molecular structure are analysed.