Mass dsc/tg and ir ascertained structure and color change of polyacrylonitrile fibers in air/nitrogen during thermal stabilization
文献类型：期刊论文
| 作者 | Sun, Tongqing1,2; Hou, Yongping1,2; Wang, Haojing1 |
| 刊名 | Journal of applied polymer science
 |
| 出版日期 | 2010-10-05 |
| 卷号 | 118期号:1页码:462-468 |
| 关键词 | Polyacrylonitrile (pan) fiber Differential scanning calorimetry (dsc) Ftir Mass spectrometry Structure change Color change Thermal stabilization |
| ISSN号 | 0021-8995 |
| DOI | 10.1002/app.32175 |
| 通讯作者 | Wang, haojing(hjwang@sxicc.ac.cn) |
| 英文摘要 | The structure evolution was studied by mass spectrum (ms), differential scanning calorimetry (dsc) and thermogravimetry (tg), fourier transform infrared (ftir) spectroscopy. the results indicated that the c=n and c=c groups appeared gradually with the increase of the temperature in air and nitrogen. the c=o groups appeared because of oxidative reaction in air. the c=n, c=c and c=o groups were all chromophores. the effect of conjugated c=n and c=c on the absorption of the visible light was shifted to longer wavelengths and indicated pi-pi* transition. there was a strong bathochromic effect as the number of c=c bonds were increased. the effect of c=o and -nh(2) on the absorption of the visible light was shifted to longer wavelengths and indicated n-pi* transition. oxygen could facilitate chemical reactions in air. hence, the color of pan in air was deeper than in nitrogen at the same temperature. the structural change of pan in air was faster and more complex than in nitrogen. pan fibers treated in air turned black after 230 degrees c. however, pan fibers turned black at 350 degrees c in nitrogen. the ms and ftir indicated that cyclization occurred before dehydrogenation during stabilization in air and nitrogen. (c) 2010 wiley periodicals, inc. j appl polym sci 118: 462-468, 2010 |
| WOS关键词 | OXIDATIVE STABILIZATION ; PAN FIBERS ; DEGRADATION ; PYROLYSIS ; POLYMERS ; POLYMETHACRYLONITRILE ; OXYGEN |
| WOS研究方向 | Polymer Science |
| WOS类目 | Polymer Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000280536400060 |
| 出版者 | JOHN WILEY & SONS INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2412167 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wang, Haojing |
| 作者单位 | 1.Chinese Acad Sci Taiyuan, Key Lab Carbon Mat, Inst Coal Chem, Taiyuan 030001, Shanxi, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Tongqing,Hou, Yongping,Wang, Haojing. Mass dsc/tg and ir ascertained structure and color change of polyacrylonitrile fibers in air/nitrogen during thermal stabilization[J]. Journal of applied polymer science,2010,118(1):462-468. |
| APA | Sun, Tongqing,Hou, Yongping,&Wang, Haojing.(2010).Mass dsc/tg and ir ascertained structure and color change of polyacrylonitrile fibers in air/nitrogen during thermal stabilization.Journal of applied polymer science,118(1),462-468. |
| MLA | Sun, Tongqing,et al."Mass dsc/tg and ir ascertained structure and color change of polyacrylonitrile fibers in air/nitrogen during thermal stabilization".Journal of applied polymer science 118.1(2010):462-468. |
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来源：中国科学院大学
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