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회분식 PMMA 중합 반응기에 대한 실험 연구
An Experimental Study for a Batch PMMA Polymerization Reactor System
HWAHAK KONGHAK, February 1996, 34(1), 117-122(6), NONE
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Abstract
회분식 반응기에서 PMMA 중합 반응 실험을 수행하여 제시된 수학적 모델의 유효성을 검증하고 중합 반응계의 특성을 조사하였다. 측정된 단량체 전환율과 평균 분자량이 제시된 수학적 모델의 해석 결과와 잘 일치함을 관찰하였으며 반응 온도 및 개시제의 초기 농도가 반응계의 특성에 크게 영향을 미치는 것을 발견하였다. 반응계의 특성을 체계적으로 규명하기 위하여 반응이 진행되는 동안 반응 온도를 등온, 강온 및 승온 궤도를 설정하고 시간에 따른 단량체 전환율 및 고분자 분자량의 변화를 분석하였다. 반응 온도가 높을수록, 그리고 개시제의 초기 농도가 높을수록 단량체 전환율은 높아지고 고분장의 평균 분자량은 낮아지는 경향을 나타내었다. 그러나 다분산도는 항상 반응이 진행됨에 따라서 증가하는 경향을 보였다. 여러 가지 반응 온도의 궤도에 대한 실험결과와 모델을 수치모사한 결과를 비교, 검토하여 반응 조건에 따른 전환율 및 고분자의 평균 분자량의 변화를 잘 예측할 수 있음을 확인하였다.
An experimental study has been carried out for a batch PMMA Polymerization reactor in order to establish the validity of the mathematical model previously developed by the present authors and also to investigate the charac-teristics of the polymerization reactor systme. The measured values of the monomer conversion and the molecular weights turned out to be in good agreement with the model prediction throughout the course of reaction. To examine the reactor characteristics systematically we considered three kinds of reactor temperature trajectory-constant, linearly increasing with time and linearly decreasing with time. As the reaction temperature increased or the initial concentra-tion of the initiator increased, the monomer conversion became higher and the average molecular weights of the polymer produced became lower. The polydispersity, however, always tended to increase as the reaction proceeded. Based on the comparison between the experimental results under various reaction conditions and the results of model analysis, it was confirmed that the monomer conversion and the average molecular weights of the polymer could be predicted with reliability.
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