ESR AND SOLID STATE 13C NMR STUDIES OF THE PYROLYTIC PRODUCTS OF POLYACRYLONITRILE

Chinese Journal of Magnetic Resonance ›› 1995, Vol. 12 ›› Issue (3): 293-298.

Previous Articles Next Articles

ESR AND SOLID STATE ¹³C NMR STUDIES OF THE PYROLYTIC PRODUCTS OF POLYACRYLONITRILE

Xie Demin¹, Shi Zhongliang¹, Su Zhongmin¹, Wang Rongshun¹, Zhang Jianguo², Liu Guizhen²

1. Department of Chemistry, Northeast Normal University, Changchun 130024;
2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received:1994-04-28 Revised:1994-10-08 Published:1995-06-05 Online:2018-01-17

Abstract

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,ΔH_PP 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.

Key words: Polyacrylonitrile, Pyrolysis, ESR, ¹³C NMR

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.

[1]	SONG Linhong, CHAI Xin, ZHANG Xu, JIANG Bin, LIU Maili. Optimizing Sensitivity-enhanced Quantitative ¹³C NMR Experiment by Genetic Algorithm [J]. Chinese Journal of Magnetic Resonance, 2023, 40(4): 365-375.
[2]	ZHAI Chonggang,WANG Pengcheng,SHAN Yubao,LAN Yu,HU Rui,YANG Yunhuang. Structure Characterization and Analgesic Activity of Novel Pyrazolo[3,4-d]pyrimidin-4-one Derivatives [J]. Chinese Journal of Magnetic Resonance, 2023, 40(1): 1-9.
[3]	Xiao-li CHEN,Tian-qiao YONG,Cheng CHEN,Juan FU,Jia-mei MO,Qiu-cheng SU. Physical and Chemical Properties of Silicone Electrolyte Materials Evaluated by Nuclear Magnetic Resonance Technology [J]. Chinese Journal of Magnetic Resonance, 2021, 38(3): 291-300.
[4]	Lei JIANG,Yang FU,Wen-wen GUO,Guo ZHENG,Qiang WANG. Nuclear Magnetic Resonance Assignment and Crystal Structure of 3, 22-Dihydroxyhopane [J]. Chinese Journal of Magnetic Resonance, 2021, 38(2): 255-267.
[5]	Xiao-li CHEN,Wei LV,Qiu-cheng SU,Juan FU,Jia-mei MO,Qi-ying LIU. Conversion of Lignocellulose Studied by Nuclear Magnetic Resonance [J]. Chinese Journal of Magnetic Resonance, 2021, 38(2): 277-290.
[6]	LIU Zhi-jun, YANG Dong, SHAO Ji-xi, HU Yao-qing. Evolution of Pore Connectivity in the Fushun Oil Shale by Low-Field Nuclear Magnetic Resonance Spectroscopy [J]. Chinese Journal of Magnetic Resonance, 2019, 36(3): 309-318.
[7]	WU Ya-xin, CAO Chen-zhong, TENG Li-li. Estimation of Formation Enthalpy for Alkanes from ¹³C NMR Chemical Shifts [J]. Chinese Journal of Magnetic Resonance, 2019, 36(1): 65-73.
[8]	FU Juan, WU Neng-you, WU Dai-dai, SU Qiu-cheng. A Solid-State ¹³C NMR and Laser Raman Spectroscopy Study on Synthesized Methane Hydrates [J]. Chinese Journal of Magnetic Resonance, 2017, 34(2): 148-155.
[9]	YANG Xian-peng, YU Hao-jie, WANG Li. Recent Progresses in ESR Studies on Ferrocenyl Compounds [J]. Chinese Journal of Magnetic Resonance, 2016, 33(3): 491-501.
[10]	WANG Qiang, LI Yu-jiang, TAO Le, GUO Xiao-he, DONG Li-hong, SONG Chuan-jun, CHANG Jun-biao. Positions of Protonation in Cytidine Hydrochloride Revealed by NMR Spectroscopy [J]. Chinese Journal of Magnetic Resonance, 2016, 33(2): 281-287.
[11]	Yury V. BOGACHEV, Mikhail N. KNYAZEV, Yaroslav Yu. MARCHENKO. Compact ESR Equipment [J]. Chinese Journal of Magnetic Resonance, 2016, 33(1): 27-36.
[12]	LI Yun-yan1,2，SUN Peng1,2，LIU Mai-li1，ZHANG Xu1*，LIU Chao-yang1. Distortionless Quantitative ¹³C DEPT⁺⁺ Experiment [J]. Chinese Journal of Magnetic Resonance, 2015, 32(1): 51-58.
[13]	PU De-bing，GAO Yuan，LI Rong-tao，LI Hai-zhou. Structures and ¹³C NMR Features of Friedelane Triterpenoid Compounds in Maytenus*: A Review [J]. Chinese Journal of Magnetic Resonance, 2014, 31(3): 437-447.
[14]	LI Shuang*, FENG Xiu-yan. A Mini Review on NMR Approaches for Coal Analysis [J]. Chinese Journal of Magnetic Resonance, 2013, 30(1): 148-155.
[15]	JIANG Xiao-Ming, Ding-Ning, Zhao-Sui. An ESR Study on Sodium Alkylbenzensulfonate Micelles [J]. Chinese Journal of Magnetic Resonance, 2012, 29(3): 388-392.

ESR AND SOLID STATE ¹³C NMR STUDIES OF THE PYROLYTIC PRODUCTS OF POLYACRYLONITRILE

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments