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采用AFM-IR技术对基于杂环芳纶F358的含氯共聚改性纤维F358Cl和氟化表面改性纤维F358F进行表面结构与性能研究,并和F358及Kevlar 49产品进行对比分析。结果显示含杂环结构芳纶F358、F358F和F358Cl因无规共聚导致纤维沿径向方向化学结构不均一,而K49纯PPTA结构使其化学组成一致性较好。4种纤维的表面形貌因结构及工艺不同而差异较大,氟化处理使纤维表面形貌发生较大变化。表面力学分析结果显示纤维经氟化处理后表面刚性有所增加,几种纤维表面刚性顺序为F358F>K49>F358>F358Cl。表面热学分析结果表明氟化后纤维F358F的转变温度为116.4℃,低于未氟化纤维F358的127.3℃。
The surface structure and properties of chlorinated copolymerization modified fiber F358Cl and fluorinated surface modified fiber F358F based on heterocyclic aramid fiber F358 were studied by AFM-IR, and their structures and properties were compared with those of F358 and Kevlar 49. The results showed that the chemical structure of fibers containing aramid fibers F358, F358F and F358Cl due to random copolymerization was not uniform along the radial direction, while K49 pure PPTA showed good chemical composition. The surface morphology of the four kinds of fibers varied greatly due to the different structures and processes, and the fluorination treatment greatly changed the surface morphology of the fibers. The results of surface mechanics analysis showed that the surface rigidity of the fibers increased after fluoridation. The order of the rigidities of several fibers was F358F> K49> F358> F358Cl. The results of surface thermal analysis showed that the transition temperature of fluorinated F358F was 116.4 ℃, which was lower than 127.3 ℃ of unfluorinated F358.