EKS纤维化学成分与定性分析方法的研究

Study on Chemical Composition and Qualitative Analysis of EKS Fiber

通过红外光谱、热分析、电感耦合等离子体原子发射光谱,测定EKS纤维的化学成分;采用燃烧法、显微镜法、溶解法、含氮呈色法、着色法、红外光谱法、回潮率法等方法对EKS纤维进行定性分析。研究结果表明:EKS纤维主要由C、H、O、N、Mg五种元素组成,纤维中无机元素质量分数为12.56%,Mg元素质量分数为7.24%,纤维主要功能基团为—NH_2、—COOH,是一种Mg盐型交联聚丙烯酸酯系纤维;EKS纤维的燃烧性能、溶解性能等与芳纶1313非常相似,且EKS纤维标准回潮率特别大,红外光谱唯一,根据纤维的这些特性,可准确地鉴别纤维,达到定性分析的目的。

The chemical composition and performance characteristics of EKS fiber are analysis by FTIR, TG-DTA,ICP-AES. Burning method, microscope method, dissolved, nitrogen in color, shading, infrared ab- sorption spectrum and moisture regain used for qualitative analysis of the fiber. The results show that EKS fiber is mainly composed of C,H,O,N,Mg, the inorganic element content reaches 12.56%, and magnesium content reaches 7.24%, the main functional groups are--NH~ and --COOH. So the fiber is a crosslinked magnesium polyacrylate series fiber. The burning behavior and solubility of EKS fiber is similar to meta-ar- amid fiber, and EKS fiber has characteristics with high moisture regain and unique infrared spectrum. The purpose of qualitative analysis is achieved by identification of EKS fiber.