通过X射线衍射、差示扫描量热法DSC、上染率、扫描电镜、纤维碱处理等实验测试,将涤纶HOY与FDY、DT、POY、UDY等长丝进行了比较,分析了HOY染色性与结构的关系。重点讨论了HOY和FDY碱处理前后的结构和染色性能之间的关系,认为HOY与普通涤纶丝的内部结构是不同的,其晶粒尺寸比较大,因而相应的无定形区较大,这是造成HOY染色性好的主要原因。 By means of X-ray diffraction, differential scanning calorimetry (DSC), dye uptake, scanning electron microscopy and fiber alkali treatment, the comparison of HOY dyeing with FDY, DT, POY and UDY filaments was carried out. Relationship with structure. The relationship between structure and dyeing properties before and after alkali treatment of HOY and FDY was discussed. It is concluded that the internal structure of HOY is different from that of ordinary polyester yarn. The larger the grain size, the larger the corresponding amorphous area Cause HOY staining good main reason.