Définition et mise au point d'une méthodologie pour l'extrapolation de procédés de copolymérisation en émulsion

Abstract : The aim of this work is the definition and the improvement of a method for the industrial scale up of emulsion polymerization. These materials are prepared by a semi-batch process in different stages in order to obtain a Core/Shell morphology. According to the process parameters used, the obtained products can reach different end-use properties. After a detailed review of the literature available on emulsion polymerization mechanisms and polymer behavior in paint formulation, the first part of the work deals with the kinetic study of two semi-batch industrial polymerizations and the analysis of the influence of the main process key parameters (reaction temperature and feedings rate) on the end use properties of the latex. The second part is dedicated to the development of an industrial recipe. First, a chemical formulation and a type of process are chosen. Then, the concemed process is modeled. The model predicts satisfactorily conversion, average molecular weights, particles sizes and concentrations as a function of operating conditions (emulsifier, initiator and monomer concentrations). Key parameters of the model are identified on the basis of batch experimental data in order to describe the overall kinetic sketch of emulsion polymerization. The model is then used as a simulator and is integrated in a multicriteria optimization procedure in order to master the quality of the product. The decision aid problem consists in obtaining the best tradeoff as possible from ali fixed objectives. The multicriteria optimization technique is elaborated from a haploid genetic algorithm. In fact, the final results will be a multivariable trajectory, optimized in a multicriteria sense, which will be later used for the predictive control of the process
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Theses
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http://docnum.univ-lorraine.fr/prive/INPL_T_2001_GINSBURGER_E.pdf
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https://hal.univ-lorraine.fr/tel-01752209
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Submitted on : Thursday, March 29, 2018 - 1:38:34 PM
Last modification on : Monday, April 16, 2018 - 10:41:31 AM

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Emmanuel Ginsburger. Définition et mise au point d'une méthodologie pour l'extrapolation de procédés de copolymérisation en émulsion. Autre. Institut National Polytechnique de Lorraine, 2001. Français. ⟨NNT : 2001INPL045N⟩. ⟨tel-01752209⟩

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