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Contribution au contrôle de la distribution de la taille des particules lors d'un procédé de polymérisation en émulsion

Abstract : The main objective of this study was to develop methods to control the particle size distribution (PSD) in emulsion polymerization processes. Controlling the PSD is an important task which determines the major end-use properties of the emulsion. The PSD affects the polymer rheology, adhesion, optical properties and the stability of the latex. The models describing the emulsion polymerization processes involves nonlinear partial differential equations (PDE). First of all, a model for predictive control was developed based on numerical investigation of the dynamical model. Then, two kinds of strategies for model predictive control (MPC) with internal model control (IMC) structure were considered. The first one is based on a nonlinear model and the second on a time varying linearized model. The PSD measurement requires sampling, dilution and analysis which is difficult to obtain on-line. Monitoring the free surfactant and the monomer concentrations gives alternative measurements to control the PSD. The design of trajectories of these concentrations allows an inferential control of the final PSD. The PSD could therefore be controlled indirectly by manipulating these concentrations. Simulation results have shown the feasibility of this approach.
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https://tel.archives-ouvertes.fr/tel-00347760
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Submitted on : Tuesday, July 21, 2009 - 3:36:32 PM
Last modification on : Wednesday, November 20, 2019 - 3:02:08 AM
Long-term archiving on: : Saturday, November 26, 2016 - 10:54:47 AM

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  • HAL Id : tel-00347760, version 3

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Bruno da Silva. Contribution au contrôle de la distribution de la taille des particules lors d'un procédé de polymérisation en émulsion. Automatique / Robotique. Université Claude Bernard - Lyon I, 2008. Français. ⟨tel-00347760v3⟩

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