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Modélisation et optimisation des procédés de polymérisation en émulsion et d'extrusion réactive pour le greffage sur polypropylène

Abstract : This thesis consists of two parts: In Part I, the differences between macro-and mini-emulsion polymerization were compared. A model on macro-emulsion polymerization has been established. This model can predict the radical chain size distribution for a given class of particle sizes. By comparison, a model on mini-emulsion polymerization has been established. This model can provide the particle size distribution and the change of droplets size. In Part II, in order to improve the properties of PP, two kinds of monomers were used to be grafted on PP by reactive extrusion. These monomers were maleic anhydride (MAH) and silane. To improve the grafting degree of MAH on PP, organically modified montmorillonite (MMT) was used as a nanoreactor. The effects of the amounts of MAH and that of initiator were studied. In order to improve the grafting degree of silane on PP, the operating conditions were studied. However, a simple relation between the product properties and the operating conditions could not be found. To obtain the highest amount of silane grafted on PP, and meanwhile, restraining the two side reactions, i.e. the polymerization of silane and the PP chain degradation, polynomial models were attempted to describe this process
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Zheng-Hui Li. Modélisation et optimisation des procédés de polymérisation en émulsion et d'extrusion réactive pour le greffage sur polypropylène. Food and Nutrition. Institut National Polytechnique de Lorraine, 2012. English. ⟨NNT : 2012LORR0090⟩. ⟨tel-01749266⟩

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