纺丝速度对涤纶FCY的无定形结构影响的研究  

Study on Effect of Spinning Speed on PET FCY Amorphous Structure

作　　者：王华平[1] 胡学超[1] 王雪芹 田建军 

机构地区：[1]中国纺织大学材料科学与工程学院,上海200051

出　　处：《中国纺织大学学报》1998年第3期14-19,共6页Journal of China Textile University

摘　　要：在3000～5000m/min纺速下制备Fully Crystallinity Yam(FCY)纤维,利用X光衍射、密度梯度等测定了无定形区的含量;并结合声速计算得到无定形区的平均取向。在M-K理论的基础上,重新定义了结构化指数,并计算得到无定形区的微细结构分布。结果表明:在其它工艺条件不变,热板位置、温度、长度分别为544mm、200℃、1800mm时,涤纶FCY的最佳纺丝速度为3 500m/min。即在3 500 m/min纺速形成的无定形结构较均匀、致密。其无定形含量低,无定形取向高,动态力学转变温度高。从tanδ～T曲线可以计算无定形区的分布,在3 500m/min纺速n_(max)、《n》及aum from ≥4 F(n)等较高,峰面积较小,相应的无定形结构较强,无定形含量较低。所得结果与其它方法的结果一致。从tanδ～T曲线可以计算无定形区的分布,且本方法与其它方法相比,更灵敏,更有效,可获得更多的信息。A series of Polyester FCY(Fully Crystallinity Yarn) are prepared at 3 000 - 5 000 m/min winding speed. By means of X - ray diffraction, Density and Sonic speed test, the amorphous fraction and orientation are gained. At the fundament of Manabe - Kamide theory, the structure index is renewed, the amorphase structure distribution are synthesized from tanδ - T curves by computer. The results show: Polyester FCY prepared at 3 500 m/min winding speed has dense and finite amorphous structure which has lower amorphous contents, higher amorphous orientation and higher dynamic transition temperature. All results are fitted each other. By the comparison of X - ray diffraction, Density and Sonic speed test methods, synthesis method from tan S - T curves by computer is faster and easier and might gain more information for amorphous structure.

关 键 词：无定形结构 涤纶 FCY 纺丝速度 力学转变 

分 类 号：TS102.522[轻工技术与工程—纺织工程]