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催化法碳纤维是将聚丙烯腈均聚或共聚纤维经过路易士酸(例如四氯化锡)处理成耐焰纤维,再经过空气氧化后,进行碳化所得到的一种碳纤维材料。催化法碳纤维具有工艺周期短,碳纤维收率高,抗拉和抗折强度较高的特点。同时电子显微镜的观测也显示出它具有规整的微观结构。但是它也存在着含有催化剂残留的杂质和纤维相对含碳率低的缺点。为此必须将这种碳纤维的非碳元素及其存在状态作一详细的分析。
Catalytic carbon fiber is a carbon fiber material obtained by carbonizing the polyacrylonitrile homopolymer or copolymerized fiber through Lewis acid (for example, tin tetrachloride) into flame-resistant fiber and then air oxidation. Catalytic carbon fiber has a short process cycle, carbon fiber yield, tensile and flexural strength higher characteristics. At the same time the electron microscope observation also shows that it has a regular microstructure. However, it also has the disadvantage of containing impurities in the catalyst residues and low relative carbon content of the fibers. For this purpose, the non-carbon elements of carbon fibers and their state of existence must be analyzed in detail.