| 聚丙烯腈热裂解产物的ESR和固体13C NMR研究 |
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| 引用本文： | 谢德民,张建国.聚丙烯腈热裂解产物的ESR和固体13C NMR研究[J].波谱学杂志,1995,12(3):293-298. |
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| 作者姓名： | 谢德民 张建国 |
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| 作者单位： | 1. 东北师范大学化学系, 长春 130024;2. 中国科学院长春应用化学研究所, 长春 130022 |
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| 摘 要： | 用电子自旋共振(ESR)和固体13C NMR研究了聚丙烯腈(PAN)在不同裂解温度(TP)下的结构变化,当TP从250℃增加到600℃,ESR信号线形没有变化,g值与TP无关,ΔHPP减小,自旋浓度(NS)开始增加,TP进一步升高,NS又减少.13C NMR谱指出在不同TP下谱峰发生很大变化,与另文报道的红外及X-射经衍射结果一致,随TP升高,PAN逐渐脱去小分子形成具有环化共轭结构的产物.
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| 关 键 词： | 聚丙烯腈 热裂解 ESR 13C NMR |
| 收稿时间： | 1994-04-28 |
ESR AND SOLID STATE 13C NMR STUDIES OF THE PYROLYTIC PRODUCTS OF POLYACRYLONITRILE |
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| Xie Demin,Shi Zhongliang,Su Zhongmin,Wang Rongshun,Zhang Jianguo,Liu Guizhen.ESR AND SOLID STATE 13C NMR STUDIES OF THE PYROLYTIC PRODUCTS OF POLYACRYLONITRILE[J].Chinese Journal of Magnetic Resonance,1995,12(3):293-298. |
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| Authors: | Xie Demin Shi Zhongliang Su Zhongmin Wang Rongshun Zhang Jianguo Liu Guizhen |
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| Institution: | 1. Department of Chemistry, Northeast Normal University, Changchun 130024;2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 |
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| Abstract: | Structural changes of polyacrylonitrile (PAN) in pyrolysis have been studied by using ESR and solid state 13C NMR.The line shape and g-factor remained constant over the whole temperature range (250-600℃).The ESR line widths,ΔHPP decrease with temperature.The spin concentration increased with the increase of temperature in the first stage and then decreased with further increase of temperature.Great change of 13C NMR spectra had been found in the process.All the results show that complicated fused conjugated ring systems are formed in the pyrolysis. |
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| Keywords: | Polyacrylonitrile Pyrolysis ESR 13C NMR |
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