张力对聚丙烯腈纤维干燥致密化过程的影响

Effect of Tension on the Drying and Collapsing Process of Polyacrylonitrile Fibers

通过在多个温度和停留时间的干燥致密化过程中负载不同张力,定量研究了张力对聚丙烯腈纤维干燥致密化过程的影响,采用X射线衍射、力学性能测试和扫描电子显微镜等方法分析了张力对聚丙烯腈纤维结构与性能的影响。结果表明,干燥致密化过程中的张力可抑制纤维尺寸收缩,使纤维微观结构发生复杂变化,可影响纤维的力学性能,并抑制纤维表面“沟槽”融并。

The effect of tension on the drying and collapsing process of polyacrylonitrile fibers under various temperatures and residence time by application different tension was quantitative studied,and the effect of tension on the structure and properties of polyacrylonitrile fibers was analyzed by X-ray diffraction,mechanical measurements and scanning electron microscope.The results reveal that the tension restrains the fiber shrinkage,causes complex changes of the microstructure and mechanical properties of the fiber,and inhibits the groove melting of the fiber surface.