Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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The Kinetics of Radical Copolymerization of Styrene with Alkyl Methacrylate in a CSTR

연속반응기에서 스티렌과 메타크릴산 알킬의 라디칼 공중합 반응속도론

  • Kim, Nam Seok (Department of Chemical Technology, Chang-won National University) ;
  • Seul, Soo Duk (Department of Chemical Engineering, Dong-A University) ;
  • Cheong, Young Eon (Group Department of Environment & Chemistry, Pusan College of Information Technology) ;
  • Park, Keun Ho (Department of Chemical Technology, Chang-won National University) ;
  • Choi, Jong jueng (Department of Industrial Chemistry, Kyungnam College of Information & Technology)
  • 김남석 (창원대학교 공업화학과) ;
  • 설수덕 (동아대학교 화학공학과) ;
  • 정영언 (부산정보대학 환경화학계열) ;
  • 박근호 (창원대학교 공업화학과) ;
  • 최종정 (경남정보대학 공업화학과)
  • Received : 1999.06.18
  • Accepted : 1999.07.10
  • Published : 1999.08.10
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Abstract

Solution copolymerization of styrene(St.) with methyl methacrylate(MMA), ethyl methacrylate(EMA) and n-butyl methacrylate(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 and 3hours, respectively. The monomer reactivity ratios, $r_1(St.)$ and $r_2(RMA)$ determined by both the Kelen-Tudos method and the Fineman-Ross method were $r_1(St.)=0.60(0.61),\;r_2(MMA)=0.59(0.60);\;r_1(St.)=0.65(0.62),\;r_2(EMA)=0.55(0.52);\;r_1(St.)=0.75(0.67),\;r_2(BMA)=0.63(0.56)$. The cross-termination factor $\Phi$ of the copolymer over the entire St. compositions ranged from 0.26 to 0.96. The $\Phi$ factors of St.-RMA copolymer were increased with increasing St. content. 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.

스티렌(St.)과 메타크릴산 메틸(MMA), 메타크릴산 에틸(EMA), 및 메타크릴산 부틸(n-BMA)을 용매인 톨루엔에서 과산화벤조일(BPO)를 개시제로 사용하여 $80^{\circ}C$에서 연속반응기를 사용하여 용액공중합을 행하였다. 반응물 부피와 체류시간은 각각 0.6 L와 3시간으로 하였다. Kelen-Tudos법(또는 Fineman-Ross법)으로 결정한 단량체 반응성비 $r_1(St.)$과 $r_2(RMA)$는 $r_1(St.)=0.60(0.61),\;r_2(MMA)=0.59(0.60);\;r_1(St.)=0.65(0.62),\;r_2(EMA)=0.55(0.52);\;r_1(St.)=0.75(0.67),\;r_2(BMA)=0.63(0.56)$와 같았다. 공중합체의 가교정지인자, $\Phi$값은 스티렌의 전체 조성에 대해 0.26~0.96을 보였으며 공중합체내 스티렌 조성이 증가할수록 $\Phi$값도 증가하였다. 시뮬레이션한 전환율과 공중합 속도를 실험 결과와 비교하였다. 동적인 정상상태에 도달하는 평균시간은 체류시간의 3.5배였다.

Keywords

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