The Kinetics of Solution Copolymerization of styrene and n-Butylmethacrylate in a Continuous Stirred Tank Reactor(CSTR)

연속반응기에서 Styrene과 n-Butylmethacrylate의 용액 공중합의 속도론

  • Kim, Nam Seok (Dept. of Chemical Engineering, Dong-A University) ;
  • Seul, Soo Duk (Dept. of Chemical Engineering, Dong-A University)
  • 김남석 (동아대학교 화학공학과) ;
  • 설수덕 (동아대학교 화학공학과)
  • Received : 1996.10.24
  • Accepted : 1997.03.19
  • Published : 1997.06.10

Abstract

Solution copolymerization of Styrene(St) and n-Butylmethacrylate(BMA) was carried out with Benzoylperoxide (BPO) as an initiator in toluene at $80^{\circ}C$ in a continuous stirred tank reactor. Reaction volume and residence time were 0.6 liters, 3 hours respectively. The monomer reactivity ratios, $r_1$(St) and $r_2$(BMA) were determined by both the Kelen-Tlidos method and the Fineman-Ross method ; $r_1$=0.75(0.67), $r_2$=0.61(0.56). The cross-termination factor, $\phi$ factor of the copolymer over the entire St compositions ranged from 0.44 to 0.78. The $\phi$ factors of St-BMA copolymer increased with increasing St compositions. Our present system showed that the continuous copolymerization of St with BMA followed second-order kinetic behavior. The simulated conversions and copolymerization rates were compared with the experimental results. The average time to reach dynamic steady-state was three times and half of the residence time.

Keywords

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