Issue

Vol. 25 No. 15 (2013): Vol 25 Issue 15

Copyright (c) 2013 AJC

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Kinetic Study and Cyclization of High Tacticity of Polyacrylonitrile Under Different Oxygen Supply Concentration

https://doi.org/10.14233/ajchem.2013.15711A
Li Zhang
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China ; Northwest Research Institute of Chemical Industry, Xi'an 710600, P.R. China
Zhiling Liu
Research institute of Yang Chang Petroleum (Group) Co., Ltd., Xi'an 710075, P.R. China
Yongqiang Dai
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Qifang Li
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China

Corresponding Author(s) : Qifang Li

leeger_zl@163.com

Asian Journal of Chemistry, Vol. 25 No. 15 (2013): Vol 25 Issue 15

Abstract

Isotactic polyacrylonitrile with triad isotacticity of 0.53 was successfully synthesized by using dialkylmagnesium as initiator. The effects of oxygen concentrating on chemical evolutions and thermal properties of iso-polyacrylonitrile were studied by Fourier transform infrared spectroscopy and thermal gravimetric analysis at different concentration (0, 20, 50 and 80 vol. %). Activation energy of thermal stabilization was obtained under non-isothermal conditions by using iso-conversional methods. The results showed that the amount of un-cyclized nitrile groups increased with oxygen concentration. This indicated that the cyclization was affected by oxygen concentration. Two stages and a large residue mass of iso-polyacrylonitrile pyrolysis during oxidation were detected in the oxygen-containing atmosphere. The activation energies were calculated by Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO) iso-conversional method under different oxygen concentration varying from 0 to 80 %.

Keywords

Polyacrylonitrile High tacticity Oxygen concentration Thermal stabilization Activation energy
Zhang, L., Liu, Z., Dai, Y., & Li, Q. (2013). Kinetic Study and Cyclization of High Tacticity of Polyacrylonitrile Under Different Oxygen Supply Concentration. Asian Journal of Chemistry, 25(15), 8803–8809. https://doi.org/10.14233/ajchem.2013.15711A
Download Citation
Endnote/Zotero/Mendeley (RIS)
BibTeX
References
  1. M.K. Jain and A.S. Abhiraman, J. Mater. Sci., 22, 278 (1987).
  2. D. Zhang and Q. Sun, J. Appl. Polym. Sci., 62, 367 (1996).
  3. A.K. Gupta, D.K. Paliwal and P. Bajaj, J. Macromol. Sci. C: Polym. Rev., C31, 48 (1991).
  4. R. Devasia, C.P.R. Nair, R. Sadhana, N.S. Babu and K.N. Ninan, J. Appl. Polym. Sci., 100, 3055 (2006).
  5. Q. Xu, L. Xu, W. Cao and S. Wu, Polym. Adv. Technol., 16, 642 (2005).
  6. J.C. Chen and I.R. Harrison, Carbon, 40, 25 (2002).
  7. J.X. Z, X. Xu, L.H. Xu and Y.Q. Dai, Polymer (Korea), 32, 150 (2008).
  8. Y.M. Hitoshi, S. Yamazaki and K. Kamide, Polym. J., 23, 765 (1991).
  9. A.J. Wan and C.X. Zhao, Polym. Mater. Sci. Eng., 17, 48 (2010).
  10. C.X. Wu, A.J. Wan and J.X. Zhao, Synth. Technol. Appl., 15, 1 (2000).
  11. S. Dalton, F. Heatley and P.M. Budd, Polymer, 40, 5531 (1999).
  12. T.-H. Ko, H.-Y. Ting and C.-H. Lin, J. Appl. Polym. Sci., 35, 631 (1988).
  13. E. Fitzer and D.J. Müller, Carbon, 13, 63 (1975).
  14. K.-I. Morita, H. Miyachi and T. Hiramatsu, Carbon, 19, 11 (1981).
  15. G.L. Collins, N.W. Thomas and G.E. Williams, Carbon, 26, 671 (1988).
  16. L.A. Beltz and R.R. Gustafson, Carbon, 34, 561 (1996).
  17. K. Kamide, H. Ono and K. Histatani, Polym. J., 24, 917 (1992).
  18. H. Ono, K. Hisatani and K. Kamide, Polym. J., 25, 245 (1993).
  19. Z. Wangxi, L. Jie and W. Gang, Carbon, 41, 2805 (2003).
  20. P. Bajaj, T.V. Sreekumar and K. Sen, J. Appl. Polym. Sci., 79, 1640 (2001).
  21. N. Grassie and R. McGuchan, Eur. Polym. J., 7, 1357 (1971).
  22. J.B. Donnet and R.C. Bansal, Carbon Fibers, Marcel Dekker, New York, edn. 2, pp. 1-82 (1990).
  23. T. Ozawa, Bull. Chem. Soc. Japan, 38, 1881 (1965).
  24. J.H. Flynn and L.A. Wall, J. Polym. Sci. B: Polym. Lett., 4, 323 (1966).
  25. H.E. Kissinger, Anal. Chem., 29, 1702 (1957).
  26. S. Tiptipakorn, S. Damrongsakkul, S. Ando, K. Hemvichian and S. Rimdusit, Polym. Degrad. Stab., 92, 1265 (2007).
  27. S.P. Zou, Y.L. Wu, M.D. Yang, C. Li and J.M. Tong, Bioresour. Technol., 101, 359 (2010).
  28. H.N. Friedlander, L.H. Peebles Jr., J. Brandrup and J.R. Kirby, Macromolecules, 1, 79 (1968).
  29. W. Watt and W. Johnson, Nature, 257, 210 (1975)
Read More
Author biographies is not available.
Download
PDF
Statistic
Read Counter : 1 Download : 0