Développement d'une méthodologie pour l'optimisation de procédés de copolymérisation en émulsion à partir des caractéristiques désirées pour les produits formulés résultants

Abstract : The aim of this study is to develop a methodology in order to optimize the pararneters of an emulsion polymerization process, so as to synthesize latexes with defined properties. The properties that are to be determined are those of the particles (composition, morphology), and those of the film Formed using the latex (Young's modulus, composition, topology, minimum film formation temperature). The main application field of the latexes concerns paints. Consequently, the web scrub resistance of the paints is a determining property. Firstly, a literature study is carriecl out about the principles of the emulsion polymerization, and the film formation. Besicles, the control of the particle morphology is developed. The latexes that are studied will be used to enter in the formulation of paints. Therefore, the composition of the paints and the main properties of the paint films are explained. After presenting the experimental techniques that are used in this study, a new experimental methodology is developed. It aims at understanding the influence of the physical and chemical properties of the latex particles on the application properties of the latex. The experimental strategy consists fïrstly in determining the particle characteristics that control the latex properties when used as films or formulatecl in paints. Afterwards, an experimental strategy is designed for the elaboration of latexes having different properties. The concepts of D-optimality and rotatability are used so as to realise this design. The following step of this experimental strategy is to define the process parameters (temperature, feecl composition and feed flow rates) that have to be applied in order to synthesize each latex. In that purpose, a software has been completed with a kinetic model of the process and a optimization algorithm (evolutionary algorithm). Besicles, a procedure has been defined and validatecl with experiments. In thiswork, the tools used to delevelop the experimental methodology are defined and set. Then, the strategy of experiments is applied to latexes composed with core / shell particles. The analysis of the properties of the latexes allowed to defined the optimal physical and chemical characteristics of the latexes and, finally, the operating experimental conditions to obtain them. The latexes were formulated in paints, and the physical properties of the paints were linked to the characteristics of the latex particles
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/INPL_T_2004_SABIN_Y.pdf
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https://hal.univ-lorraine.fr/tel-01752310
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Submitted on : Thursday, March 29, 2018 - 1:40:48 PM
Last modification on : Thursday, January 31, 2019 - 1:27:49 AM

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Yannick Sabin. Développement d'une méthodologie pour l'optimisation de procédés de copolymérisation en émulsion à partir des caractéristiques désirées pour les produits formulés résultants. Autre. Institut National Polytechnique de Lorraine, 2004. Français. ⟨NNT : 2004INPL102N⟩. ⟨tel-01752310⟩

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