海岛纤维结构形态与染色性能的研究

通过色差仪、DSC、结晶速度测量、显微图像分析以及动态机械热分析研究了四种海岛纤维的结晶度、结晶速度、晶粒大小、玻璃化温度与染色性能的关系.结果表明:结晶度小,结晶速度慢,晶粒尺寸大,玻璃化温度低等等均有利于纤维染色性能的提高.

Study of Sea-island Fibers Structure and Their Dyeing Properties

Dyeing is one of the biggest problems of sea-island fibers.It is well known that dyeing quality of industrial poly ethylene terephthalate(PET) yarns can be greatly influenced by the physical and structural properties of the yarns.In order to evaluate the effect of physical and structural properties on dyeing performance of sea-island fibers,this article dealt with four commercially available sea-island super micro fibers,whose main component were PET and the specifications were 105/48*37i,105/48*25i,105/36*37i,and 105/36*37i~*;their chromatic differences were characterized and compared using a color difference meter;and subsequently the different physical and structural factors that may affect the dyeing performance,such as the glass-transition temperature,the degree of crystallinity,the crystallization rate,and the grain size of these fibers,were investigated.The relationship between dyeing performance and these factors was studied.Differential scanning calorimetry(DSC) revealed that low degree of crystallinity exerted favorable influence on dyeing.Crystallization detector suggested that dyeing quality was improved as crystallization rate decreased.When these fibers were observed under polarizing microscope,it showed that good dyeing quality was related to big grain size.The results of the dynamic mechanical thermo analysis(DMTA) showed that fibers with low glass-transition temperature tended to yield good dyeing quality because of the molecular motion.