Crystalline behaviors and phase transition during the manufacture of fine denier PA6 fibers

作     者：ZHANG ChengFeng LIU YuHai LIU ShaoXuan LI HuiZhen HUANG Kun PAN QingHua HUA XiaoHui HAO ChaoWei MA QingFang LV ChangYou LI WeiHong YANG ZhanLan ZHAO Ying WANG DuJin LAI GuoQiao JIANG JianXiong XU YiZhuang WU JinGuang 

作者机构：Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Engineering PlasticsJoint Laboratory for Polymer Science and MaterialsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Beijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Key Laboratory of Organosilicon Chemistry and Material Technology Ministry of EducationHangzhou Normal UniversityHang-zhou 310012China College of Chemistry and Environmental ScienceHenan Normal UniversityXinxiang 453007China Graduate University of Chinese Academy of SciencesBeijing 100190China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2009年第52卷第11期

页      面：1835-1842页

核心收录：

学科分类：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] 

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 50673005, 50973003 & 20671007) a program of Advanced Technology Institute, Peking University 

主　　题：nylon 6 fiber crystallization FT-IR XRD 

摘      要：Recently we have successfully produced fine denier PA6 fibers by using additives containing lanthanide ***,crystallization and phase transition of PA6 fibers during spinning and drawing processes were *** the spinning process,β phase crystal could be obtained in as-spun PA6 fibers which were produced with relatively high melt draw ratio,while γ phase crystal predominated when the melt draw ratio was relatively low.β phase crystal,whose behaviors are similar with those of γ phase by FT-IR and XRD characterization,could be transformed to α form easily when PA6 fibers are immersed in boiling ***,γ phase crystal of PA6 remains unchanged in boiling ***,β and γ phase crystals of PA6 can be differentiated by the crystalline behaviors of PA6 fibers after treatment in boiling *** experiments demonstrate that the β phase can also be produced during a drawing process where a phase transformation from γ to α *** other words,β phase may act as an intermediate state during the phase transformation.