Abstract

In order to improve the mechanical properties of the poly(m-phenylene isophthalamide(PMIA) fiber, poly(vinyl pyrrolidone)(PVP) was blended with PMIA as a functional component. High-strength PMIA/PVP composite fibers were prepared by wet spinning, and the properties of the solutions and fibers were characterized by polarized light microscopy (PLM) and rheology measurements, fourier transform infrared spectroscopy (FTIR), fiber mechanical strength tester, scanning electron microscope (SEM), thermogravimetric(TG), limiting oxygen index(LOI) instrument and so on. The results showed that the addition of PVP can effectively weaken the hydrogen bonding between the PMIA molecular chains. The breaking strength of the composite fiber (3.85 cN/dtex) was much higher than that of the pristine PMIA fiber (2.71 cN/dtex), and the elongation at break of composite fibers was 170% higher than that of pristine PMIA fiber. The heat resistance and flame retardancy of the composite fibers had hardly decreased. Composite fibers can still meet the requirements of flame retardant clothing. Compared with pristine PMIA fiber, PMIA/PVP composite fiber will have greater application prospects.

摘要

为了提高聚（m）的力学性能-亚苯基间苯二甲酰胺（PMIA）纤维，聚乙烯吡咯烷酮（PVP）与PMIA作为功能组分共混。采用湿法纺丝法制备高强度PMIA/PVP复合纤维，并通过偏光显微镜（PLM）和流变学测量、傅里叶变换红外光谱（FTIR）、纤维机械强度测试仪、扫描电子仪对溶液和纤维的性能进行表征。显微镜（SEM）、热重（TG）、极限氧指数（LOI）仪等。结果表明，PVP的加入可以有效削弱PMIA分子链之间的氢键。复合纤维的断裂强度（3.85 cN/dtex）远高于原始PMIA纤维（2.71 cN/dtex），复合纤维的断裂伸长率比原始PMIA纤维高170%。复合纤维的耐热性和阻燃性几乎没有下降。复合纤维仍能满足阻燃服装的要求。与原始的PMIA纤维相比，PMIA/PVP复合纤维将具有更大的应用前景。