XPS Investigation into Thermal Degradation and Stabilization of Polyacrylonitrile Fibers
PAN copolymer fibers have been heated in air to different HTT from 190 to 270℃. The functionalities of the C, O and N in the precursors were determined by X-ray photoelectron spectroscopy (XPS). The intensity of Cls spectra line 286.8ev which is identified as C-O and C=N functionalities has been found to initially increase, and suddenly decrease above 230℃. Additionally, the significant broadening of Nls spectra line has also been observed at the same HTT. It is suggested that some oxygen has been incorporated to the six-member heterocyclic structures that formed by cyclization of nitrile groups, and transformed into pyridone structures by elimination of carbon monoxide.
聚丙烯腈 共聚纤维 杂环结构
Gangping Wu Chunxiang Lu Aimin Hao Yonghong Li Jiangguo Zhao Yansheng Li Licheng Ling
Key Laboratory of Carbon Materials, Chinese Academy of Sciences Institute of Coal Conversion, Chinese Academy of Sciences, Taiyuan 030001
国内会议
台湾
英文
90-95
2004-09-14（万方平台首次上网日期，不代表论文的发表时间）