Characterization of Structural Knot Distributions in UHMWPE Fibers

作     者：Hao-jun Xu Min-fang An You Lv 王宗宝 Qun Gu 

作者机构：Ningbo Key Laboratory of Specialty Polymers Faculty of Materials Sctence and Chemical Engineering Ningbo University Ningbo 315211 China College of Material Engineering Ningbo University of Technology Ningbo 315211 China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2016年第34卷第5期

页      面：606-615页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(No.51273210) the Open Research Fund of State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry Chinese Academy of Sciences and the K.C.Wong Magna Fund in Ningbo University 

主　　题：UHMWPE shish hexagonal calorimetry SAXS lamellar bamboo crystalline chains WAXD 

摘      要：Microbeam wide-angle X-ray diffraction（WAXD） experiments were carried out at different structural knot positions of SIOC and M4 fibers of ultra-high molecular weight polyethylene（UHMWPE）. The optical microscope images revealed that SIOC fiber had bamboo-like structural knots, and M4 fiber had chaotic distribution of structural knots. WAXD patterns showed the monoclinic unit cell in the whole M4 fiber, but different lamellar orientations in the bamboo joint of SIOC fiber. In addition, small-angle X-ray scattering（SAXS） patterns confirmed that the SIOC fiber contained uniform distribution of shish structures, and differential scanning calorimetry（DSC） measurements showed that its less branched and short chains benefited the orthorhombic-hexagonal phase transformation.