Influence of dope dyeing on structure and properties of PAN fiber

In order to promote the development and popularization of downstream products of the dopedyed PAN,X-ray diffraction analysis and scanning electron microscope(SEM) were used to examine the crystalline structure,orientation and morphology of the dope-dyed PAN fiber.The results indicated that the crystalline structure,orientation and morphological structure were influenced by the addition of pigment.Meanwhile,the physical mechanical properties of the dope-dyed PAN fiber were improved obviously,with heat-resistance enhanced and little effect on hygroscopic property.Its overall performances were better than that of the conventional PAN fiber.