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研究了超高相对分子质量聚乙烯(UHMWPE)的性能,采用冻胶纺丝-超倍拉伸技术,对不同UHMWPE进行纺丝,制得UHMEPW纤维;通过扫描电镜、广角X射线衍射、声速法、强力仪,对UHMWPE纤维的结构与性能进行研究。结果表明:不同UHMWPE的相对分子质量、粒径分布等物理性能对其的溶胀溶解、以及纺制纤维的性能有较大影响;UHMWPE的粒径分布宽度小,溶胀比大,所得纤维的性能较好;UHMWPE纤维用原料具有如下特征:特性粘数为20～26 dL/g,平均粒径为166～185μm,粒度分布宽度小于1.1,堆积密度0.41～0.45 g/cm~3,屈服强度大于20 MPa,拉伸强度大于29 MPa,弹性模量大于700 MPa,断裂伸长率大于32%。
The properties of ultra-high molecular weight polyethylene (UHMWPE) were studied. The UHMWPE fibers were spun by different methods of jelly-spinning and ultra-times stretching. UHMWPE fibers were obtained by scanning electron microscopy, wide angle X-ray diffraction, , Powerful instrument, UHMWPE fiber structure and performance research. The results show that the relative molecular weight, particle size distribution and other physical properties of UHMWPE have a great influence on the swelling and dissolution of the UHMWPE and the properties of the spun fiber. The particle size distribution of UHMWPE is small and the swelling ratio is large. Good; UHMWPE fiber raw materials have the following characteristics: intrinsic viscosity of 20 ~ 26 dL / g, an average particle size of 166 ~ 185μm, a particle size distribution width of less than 1.1, a bulk density of 0.41 ~ 0.45 g / cm ~ 3, yield strength greater than 20 MPa, tensile strength greater than 29 MPa, modulus of elasticity greater than 700 MPa and elongation at break greater than 32%.