【摘要】 用丙烯腈(AN)、衣糠酸(IA)、丙烯酸甲酯(MA)进行三元自由基溶液共聚合,经湿法纺丝制得聚丙烯腈(PAN)原丝,然后进行预氧化和炭化处理,并用SEM和TEM等分析方法跟踪过程中纤维微观结构的变化。结果表明:碳纤维的微观组织结构与原丝的微观组织结构密切相关,高强度、高取向度、结构均匀和弥散性好的原丝是获得高强度和高模量碳纤维的前提。更多还原

【Abstract】 This paper has discussed about freeradical solution copolymerization of itaconic acid and acrylonitrile and methyl acrylate was carried out in DMSO using azodiisobutyronitrile as initiator. The resulting polymerization solution was spun to form PAN precursors of carbon fibres, then oxidized and carbonized in our laboratory, the structure and properties of resulting PAN precursors and the abnormal spinning conditions were characterized by SEM and TEM ,also in the oxidization and carbonization.It was shown that the morphology structure of fibre cross section has heredity and expanding tendency as stabilization of PAN precursors, PAN fiber has been used as the precursor for making highperformance carbon fibers.the precursor with high quality should has high tensile, high perferred orientation and so on which needs fewer flaws inside carbon fiber and fewer surface flaws on the fiber.更多还原