Elaboration et caractérisation de mélanges de polymères à base de polypropylène et de polycarbonate à propriétés optimisées

Abstract : Polymer blending provides a practical and economic way of preparing new materials with combinations of properties not available in a single polymer. In order to improve the toughness of polypropylene while retaining its rigidity as much as possible, a new concept rigid rigid polymer toughening was developed. Polycarbonate (PC) was selected to blend with PP in this study because of the advantages it provides over many other conventional engineering polymers in terms of high strength and toughness. The key to obtaining materials with high toughness and balanced rigidity relies on effectively compatibilizing this polymer pair and reducing the viscosity ratio. In this study, novel compatibilizers for the PP/PC blend were prepared or chosen to promote interactions between PP and PC and control the morphology of the blend. Some of the compatibilizers took the role of both compatibilizer and toughener. The performance of compatibilizers and toughening mechanism of blends were studied in detail. The morphology evolution of PP/PC blends and the relationship between the composition and microstructure were simulated based on molecular dynamics and mesodyn theories
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Shann-Shan Dai. Elaboration et caractérisation de mélanges de polymères à base de polypropylène et de polycarbonate à propriétés optimisées. Autre. Institut National Polytechnique de Lorraine, 2010. Français. ⟨NNT : 2010INPL023N⟩. ⟨tel-01748917⟩

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