聚醚酯弹性纤维的制备及其结构与性能  

Preparation of polyether ester elastic fiber and its structure and properties

作　　者：张梦茹 王灿 肖汪洋 廖梦蝶 王秀华[1] ZHANG Mengru;WANG Can;XIAO Wangyang;LIAO Mengdie;WANG Xiuhua(National Engineering Laboratory for Textile Fiber Materials and Processing Technology,Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China)

机构地区：[1]浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室,浙江杭州310018

出　　处：《纺织学报》2024年第8期81-88,共8页Journal of Textile Research

基　　金：浙江省现代纺织技术创新中心定向项目(CXZX2022010HD)。

摘　　要：为研究牵伸倍数及热定形温度对聚醚酯弹性纤维性能的影响,采用卧式微量单孔挤出机制备了聚醚酯初生纤维及其牵伸丝。采用X射线衍射仪、声速取向仪、电子单纱强力机、纱线强伸度仪等对纤维的结晶结构、取向结构、力学性能、回弹性和收缩性能进行测试与分析。结果表明:当热定形温度为100℃时,随着牵伸倍数的增加,聚醚酯弹性纤维的结晶度、取向度、沸水收缩率和干热收缩率均呈上升趋势,断裂强度由1.44 cN/dtex增加至2.68 cN/dtex,断裂伸长率由179.9%下降到31.0%,在牵伸5倍时定伸长20%的弹性回复率可达到96.2%;当牵伸5倍时,随着热定形温度的升高,聚醚酯弹性纤维的结晶度增加,取向度、沸水收缩率及干热收缩率呈下降趋势,断裂强度与弹性回复率变化不大,断裂伸长率先升高后降低,热定形温度为140℃时的断裂强度达2.49 cN/dtex,定伸长20%的弹性回复率达到96.6%。Objective To improve the current situation of single variety of elastic fibers in the field of textiles and apparel,thermoplastic polyether ester elastic(TPEE)fibers were prepared by melt spinning,aiming to achieve advantages of high elasticity,low hysteresis and easy processing.This research was set to study the effects of drafting and heat setting process on the properties of TPEE fibers in order to provide support for the development and application of the fibers.Method Thermoplastic polyether ester fibers were prepared by horizontal micro single-hole extruder,then drafted and heat-set to form drafted fibers.The crystallization properties,orientation properties,mechanical properties,elastic recovery properties and thermal shrinkage properties of TPEE fibers were tested and analyzed by X-ray diffractometer,sound velocity orientation instrument,and single yarn tesnsile tester.Results The effects of drafting ratio and heat setting temperature on the structure and properties of TPEE fibers were investigated by varying the drafting ratio and heat setting temperature.The results showed that when the heat setting temperature was 100℃and the drafting ratio was increased from 3 times to 6 times,the crystallinity and orientation degree of TPEE fibers were increased with the increase of drafting ratio.With the increase of drafting ratio,the breaking strength of TPEE fibers was increased from 1.44 cN/dtex to 2.68 cN/dtex,the elongation at break decreased from 179.9%to 31.0%,and the elastic recovery rate initially increased and then decreased.When the drafting ratio was 5 times,the elastic recovery rate reached the maximum value of 96.2%.When the drafting ratio changed from 3 times to 6 times,the boiling water shrinkage rate was increased from 15.9%to 27.4%,and the dry heat shrinkage rate increased from 14.4%to 28.2%.With a 5 times drawing ratio,when the heat setting temperature was increased from 80℃to 140℃,the crystallinity of TPEE fibers was increased and the total orientation degree of the TPEE fibers was decreas

关 键 词：聚醚酯弹性纤维 结晶 取向 弹性回复率 热收缩性能 热定形 

分 类 号：TS102.6[轻工技术与工程—纺织工程]