超拉伸过程中UHMWPE纤维结构与性能的研究  

Study on structure and property of UHMWPE fiber during super drawing

作　　者：王红英[1] 韩英[1] 田慕川[1] 付中玉[1] 

机构地区：[1]北京服装学院材料工程系,北京100029

出　　处：《合成纤维工业》2004年第2期4-6,9,共4页China Synthetic Fiber Industry

基　　金：北京市重点实验室 (服装材料研究开发与评价实验室 )开放课题 ( 2 0 0 2 A 3 )

摘　　要：利用密度梯度仪、声速取向仪、Instron材料强力仪、WAXD、DSC等手段 ,对超高相对分子质量聚乙烯 (UHMWPE)纤维在超拉伸过程中的结构和性能进行了测试研究。结果表明 ,不同拉伸倍数的UHMWPE纤维的结晶度、取向度、力学性能和熔融温度随着拉伸倍数的增大而增加 ;DSC图谱上的 Tm4 峰和WAXD分析证实了在超拉伸过程中UHMWPE纤维发生了正交晶相向六方晶相的转变 ,超拉伸后期结晶结构的变化对纤维的力学性能影响很大。The structure and properties of ultrahigh-relative molecular mass polyethylene (UHMWPE) fiber were measured during super drawing by density gradient test,sonic velocity orientation test,Instron strength test,WAXD and DSC. The results showed that the crystallinity,degree of orientation,mechanical properties and melting temperature of UHMWPE fiber was increased with the draw ratio. T m4 peak in DSC spectrum and WAXD spectrum showed that the crystal structure of UHMWPE fiber transformed from tetragonal phase to hexagonal phase during super drawing. And the crystal structure transformation had a great effect on the mechanical properties of UHMWPE fiber at the later stage of super drawing.

关 键 词：分子质量 聚乙烯纤维 力学性能 结晶度 纤维取向度 拉伸倍数 密度 

分 类 号：TQ342.7[化学工程—化纤工业]