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Korean Carbon Society (한국탄소학회)
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Molecular Weight Distribution of Liquid Phase AN and Solid Phase Polymer in Precipitation Polymerization of AN By Changing Solution Composition and Temperature

  • Liu, Weiwei (State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology) ;
  • Zhang, Shuangkun (State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology) ;
  • Wang, Jing (State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology) ;
  • Ryu, Seung Kon (Jeonju Institute of Machinery and Carbon Composites) ;
  • Jin, Ri-Guang (State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology)
  • Received : 2012.03.20
  • Accepted : 2012.06.01
  • Published : 2012.07.31
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Abstract

According to kinetic mechanisms, liquid phase polymerization and solid phase polymerization are different in acrylonitrile (AN) polymerization, and so the relationship between the contribution ratio and molecular weight distribution (MWD) was obtained through theoretic analysis. The precipitation homopolymerization of AN was carried out in a mixture solution of dimethyl sulfoxide (DMSO) and water at $50{\sim}65^{\circ}C$ using ${\alpha}$,${\alpha}^{\prime}$-azobisisobutyronitrile as an initiator. The contribution ratio decreased and approached 0; the MWD also decreased and approached 2 with the increase of the $H_2O$/DMSO ratio from 10/90 to 90/10. The experimental data were found to coincide well with the theoretical equation derived from the mechanisms.

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References

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