高强低伸型聚酯工业丝受热条件下的应用特性变化  

Application Characteristics of High Strength and Low Stretch Polyester Industrial Yarn Under Heating Conditions

作　　者：邹家熊 于金超[1] 张烨[2] 邵义伟 张玉梅[1] 王华平[1] ZOU Jia-xiong;YU Jin-chao;ZHANG Ye;SHAO Yi-wei;ZHANG Yu-wei;WANG Hua-ping(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Material Science and Engineering,Donghua University,Shanghai 201620,China;Jiangsu Hengli Group Co. Ltd.,Suzhou 215226,Jiangsu,China)

机构地区：[1]东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620 [2]江苏恒力化纤股份有限公司,江苏苏州215226

出　　处：《合成纤维》2019年第2期7-11,共5页Synthetic Fiber in China

基　　金：国家重点研究开发计划资助项目(2016YFB030300)

摘　　要：为评价聚酯工业丝在受热条件下的应用特性,模拟聚酯工业丝的受热条件,在其结构易发生转变的温度(140℃)附近进行紧张热处理,探讨了温度、时间、张力对聚酯工业丝结构性能的影响。结果表明:纤维经过热处理后,断裂强度总体变化幅度不大,但能够反映聚酯工业丝的应用特性的指标如初始模量、5%定伸长时的应力(Lase-5)、定载荷下的伸长率等指标受热处理条件影响很大。在温度较高、受热时间短、张力小的情况下,纤维内主要发生无定形区分子链的松弛,致使其初始模量和Lase-5显著降低。在延长受热时间、增加张力的情况下,利于无定形区重排为有序结构,纤维的初始模量、Lase-5和干热收缩率的下降程度减小。In order to evaluate the application characteristics of high strength and low stretch polyester industrial yarn under heating conditions, heat treatment with tension was canied out near its structural transition temperature (140℃).The effect of temperature, time and tension on the structure and properties ch ci nges of polyester industrial yarn was discussed. The results show that after the heat treatment, the tenacity of the fibers changes little. However, indicators such as initial modulus, stress st 5% elongation (Lase-5) and elongation under constant load are greatly affected by heat treatment conditions, which could reflect the application characteristics of polyester industrial yarn. The molecular chains in amorphous region will stretch under the treatment with high temperature, short heating time and low tension, which leads to a significant decrease of initial modulus and Lase-5. The prolongation of heat treatment and the increase of tension is beneficial to the reanangement of amorphous region into ordered stmcture, which slow down the decrease of initial modulus, Lase-5 and dry heat shrinkage.

关 键 词：聚酯工业丝 应用特性 耐热性 

分 类 号：TQ342.21[化学工程—化纤工业]