Chinese Journal of Magnetic Resonance ›› 2006, Vol. 23 ›› Issue (2): 187-192.

• Articles • Previous Articles     Next Articles

60Co γ Irradiation Induced Polymerization of Acrylonitrile Studied by NMR Spectroscopy

  

  1. The Center of Analysis and Measurement of Xinjiang University, Urumqi 830046, China
  • Received:2005-10-14 Revised:2005-10-26 Published:2006-06-05 Online:2006-06-05
  • Supported by:

    波谱与原子分子物理国家重点实验室资助课题(T012406).

Abstract:

60Co γ irradiation induced polymerization of acrylinitrile (AN) was studied by 1H and 13C NMR spectroscopy. The results show that the signal intensities of AN monomer peaks decrease after irradiation, and this is accompanied by the appearance of a polymer peak, whose signal intensity increases with the irradiation dose. The sequence distribution of polyacrylonitrile was assigned using 13C NMR data. The results of variable temperature experiments indicate that there exist hydrogen bonds, as well as proton exchange, between residual water and the -OH group on the polymer. Relaxation time measurements show that the motion of polymer segments is not influenced significantly by the increase of irradiation dose.

Key words: NMR, spin-lattice relaxation time, spin-spin relaxation time, hydrogen bond, proton exchange, sequence structure

CLC Number: