Carbon letters

Korean Carbon Society (한국탄소학회)
권호 표지
DOI QR코드

DOI QR Code

Experimental and Theoretical Investigations of PAN Molecular Weight Increase in Precipitation Polymerization as a Function of H2O/DMSO Ratio

  • Zhang, Jing (State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology) ;
  • Bu, Fengjing (State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology) ;
  • Dai, Yongqiang (State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology) ;
  • Xue, Liwei (State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology) ;
  • Xu, Zhixian (Dept. of Chemistry and Chemical Engineering, Anyang Normal University) ;
  • Ryu, Seung-Kon (Dept. of Chemical Engineering, Chungnam National University) ;
  • Jin, Riguang (State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology)
  • Received : 2010.02.08
  • Accepted : 2010.03.10
  • Published : 2010.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

The precipitation polymerization of acrylonitrile (AN) was carried out in a mixture solution of dimethyl sulfoxide (DMSO) and water at $50{\sim}65^{\circ}C$ using ${\alpha},{\alpha}'$-azobisisobutyronitrile (AIBN) as an initiator. The increased molecular weight polyacrylonitrile (PAN) was prepared with increasing the $H_2O$/DMSO ratio from 10/90 to 80/20. The viscosity average molecular weight of $H_2O$/DMSO solvent was 4.4 times larger than that of $H_2O$/DMF solvent, and precipitation polymerization was accelerlated due to the far decreased chain transfer effect of DMSO. Based on the experimental results, the increased PAN molecular weight was regarded as the summation of two mechanisms: i) particle-particle aggregation and ii) particle-radical attachment. The theoretical equation derived from the mechanisms was well coincided with the experimental results showing the linear relationship between the viscosity average molecular weight and the H2O/DMSO ratio.

Keywords

References

  1. Wu, S. Z. Polym. Adv. Technol. 2005, 16, 642. https://doi.org/10.1002/pat.625
  2. Bajaj, P. Indian J. of Appl. Polym. Sci. 2002, 79, 1640.
  3. Ho, C. T.; Chung, Carbon 1990, 28, 831. https://doi.org/10.1016/0008-6223(90)90331-R
  4. Mittal, J.; R. B. Mathur, R. B.; Bahl, O. P. Carbon 1997, 35, 1713. https://doi.org/10.1016/S0008-6223(97)00126-7
  5. Hou, C. J. of Appl. Polym. Sci. 2006, 101, 2095. https://doi.org/10.1002/app.23837
  6. Hou, C.; Liu, J.; Yang, L. J. of Appl. Polym. Sci. 2006, 100, 4679. https://doi.org/10.1002/app.22854
  7. Chen, J. C.; Harrison, I. R. Carbon 2002, 40, 25. https://doi.org/10.1016/S0008-6223(01)00050-1
  8. Wilkinson, K. American Patant, 96P 39552, 1996212212, USA.
  9. Jia, D. M.; Yang, M. Y. Chemical Fiber of Beijing 1998, 2, 1.
  10. Cai, H. S. Acta Polymerica Sinica 1999, 5, 1.
  11. Bahrami, S. H. Iranian Polym. Jourmal 2005, 14, 1032.
  12. Wang, Y. Z.; Zhu, B. Journal of Shangdong University 2002, 33, 362.
  13. Zhang, W. X. "PAN-based carbon fiber", Donghua University Press, 2005, 12.
  14. Wang, C. G. European Polym. Journal 2006, 42, 1093. https://doi.org/10.1016/j.eurpolymj.2005.10.016
  15. Kashyap, A. K.; Kalpagam, V. J. Polym Sci Part: Ploym Chem Edit 1979, 17, 1243.
  16. Roychen, J.; Surekha, D.; Animesh, K. R. Polym Int. 1991, 26, 89. https://doi.org/10.1002/pi.4990260206

Cited by

  1. Contribution of the solid phase polymerization to the molecular weight distribution in acrylonitrile precipitation copolymerization vol.30, pp.3, 2013, https://doi.org/10.1007/s11814-012-0183-0