热处理对杂环芳纶结构与性能的影响  

Effect of heat treatment on structure and properties of heterocyclic aramid fiber

作　　者：唐国平[1] 陈蕾[1] 朱灵玲[2] 诸静[2] 于俊荣[1] 胡祖明[1,2] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海201620 [2]高性能纤维及制品教育部重点实验室,上海201620

出　　处：《合成纤维工业》2013年第4期13-16,共4页China Synthetic Fiber Industry

基　　金：国家973计划资助项目(2011CB606103);国家863计划资助项目(2012AA03A212);纤维材料改性国家重点实验室重大研究课题资助项目(LZ0914)

摘　　要：采用了热失重分析仪(TGA)、傅里叶变换红外光谱(FTIR),扫描电子显微镜(SEM),广角X射线衍射(WAXD)等手段研究热处理对含杂环的共聚芳香族聚酰胺纤维结构与性能的影响。结果表明:热处理条件为氮气气氛,温度420℃,时间4 min,拉伸倍数为1;经过热处理后杂环芳纶的化学结构没有明显的变化,纤维结晶度由11.2%提高到51.6%,纤维的取向度显著提高,纤维的表面更加光滑致密;纤维的热稳定性无明显变化,纤维的线密度有略微变小,断裂强度为23.8 cN/dtex,弹性模量为1 041.43 cN/dtex。The effect of heat treatment on the structure and properties of heterocyclic aromatic polyamide fiber was studied by thermogravimetric analysis （ TGA）, Fourier transform infrared spectrometry （ FTIR）, scanning electron microscopy （ SEM ）, wide-angle X-ray diffraction（WAXD）. The results showed that the chemical structure and the thermal stability of heterocyclic ar- amid fiber did not obviously change, the crystallinity rose from 11.2% to 51.6%, the fiber orientation degree remarkably in- creased, the surface became smoother and denser, the linear density slightly decreased, and the breaking strength and modulus were 23.86% cN/dtex and 1 041.43 cN/dtex, respectively, after the heat treatment under the conditions of nitrogen atmos- phere, temperature 420 ℃, time 4 min and draw ratio 1.

关 键 词：芳香族聚酰胺纤维 杂环 热处理 结构 力学性能 

分 类 号：TQ342.72[化学工程—化纤工业]