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Résines époxy/amine pour le rotomoulage réactif : étude de la rhéocinétique et simulation numérique de l'écoulement

Abstract : This Ph.D research work is about the rheo-kinetics study of two epoxy/amine systems ( DGEBA/DETDA and DGEBA/IPD) for reactive rotational molding (RRM). The kinetic parameters of the auto-catlytic and non catalytic crosslinking was established using inverse method of the in situ isothermal crosslinking by Near Infrared Spectroscopy (NIR). The dierence of the rheokinetic behavior and the viscosity variation between two systems was explained by the dierence of reactivity of the amine hardener and especially the substitution eect (the reactivity of secondary amine is less than the one of the primary amine groups). A new method of substitution eect was established by using the conversion ratio of epoxy and primary amine groups as measured by NIR. Time-Temperature-Transformation diagram was established after studying the vitrication and gelation by thermal and rheological analysis. The "rotomouldability" of both systems was estimated by adding the iso-viscosity curves on TTT diagrams. The free surface ow during rotational molding was modeled by the uid ow inside a horizontal rotating cylinder. The meshless and lagrangian Smoothed Particle Hydrodynamics (SPH) method was applied to simulate the ow by using an adapted viscosity expression.
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https://pastel.archives-ouvertes.fr/pastel-00003668
Contributor : Ecole Arts Et Métiers Paristech <>
Submitted on : Monday, May 19, 2008 - 8:00:00 AM
Last modification on : Thursday, January 11, 2018 - 6:20:30 AM
Long-term archiving on: : Wednesday, September 8, 2010 - 5:52:52 PM

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  • HAL Id : pastel-00003668, version 1

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Eskandar Mounif. Résines époxy/amine pour le rotomoulage réactif : étude de la rhéocinétique et simulation numérique de l'écoulement. Sciences de l'ingénieur [physics]. Arts et Métiers ParisTech, 2008. Français. ⟨NNT : 2008ENAM0004⟩. ⟨pastel-00003668⟩

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