Structural Evolution of UHMWPE Fibers during Poststretching with Distinct Initial Structures  

作　　者：CAO Tian REN Lin MENG Lingpu CHEN Xiaowei WANG Ping 

机构地区：[1]School of Materials and Chemical Engineering,Anhui Jianzhu University,Hefei,230601,China [2]National Synchrotron Radiation Lab,CAS Key Laboratory of Soft Matter Chemistry,University of Science and Technology of China,Hefei,230026,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第2期280-285,共6页武汉理工大学学报（材料科学英文版）

基　　金：Founded by the PhD Foundation of Anhui Jianzhu University (2018QD59);the Natural Science Foundation of Anhui Ed ucation Department (Nos.KJ2021A0624,KJ2019JD18,and KJ2019A0774);the National Natural Science Foundation of China (Nos.51903002,51703218,and 51633009);the Anhui Provincial Science and Technology Major Projects (Nos.17030901101 and 201903a05020027)。

摘　　要：By adopting a homemade extension apparatus and wide-angle X-ray diffraction(WAXD)technique,the structural evolutions of the extracted ultra-high molecular weight polyethylene(UHMWPE)fibers with different spinning draw ratios were investigated during the poststretching process.Molecular chains oriented along the axis quickly at the early stage of drawing,which is quite different from the situation of drawing with solvents.The crystal regions,which have not melted at higher temperature,show stronger rigidity in the absence of solvents.Rigid characteristics show faster response to the external field.Also,the surface morphologies of fibers after poststretching are characterized by scanning electron microscopy(SEM).The lamellae stack disordered before stretching,but arranged in order along the draw direction when the draw ratios were larger than 1.

关 键 词：UHMWPE fibre gel-spinning draw ratio WAXD SEM 

分 类 号：TQ342.61[化学工程—化纤工业]