Mounif, Eskandar (2008) Epoxy/amine resins for reactive rotational molding (RMM) : rheokinetic study and 2D simulation of the flow. PhD thesis Mécanique et matériaux, Laboratoire d'Ingénierie des Matériaux, ENSAM 2008ENAM0004 p.130.
Full text available as:
|
|
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 difference of the rheokinetic behavior and the viscosity variation between two systems was explained by the difference of reactivity of the amine hardener and especially the substitution effect (the reactivity of secondary amine is less than the one of the primary amine groups). A new method of substitution effect 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 vitrification 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 flow during rotational molding was modeled by the fluid flow inside a horizontal rotating cylinder. The meshless and lagrangian Smoothed Particle Hydrodynamics (SPH) method was applied to simulate the flow by using an adapted viscosity expression.
| Item Type: | PhD Thesis (PhD) |
|---|---|
| PhD Supervisor: | Tcharkhtchi, Abbas and Bellenger, Véronique |
| Date: | 14 March 2008 |
| Board of examiners: | Agassant, Jean-François and Gérard, Jean-François and Maazouz, Abderrahim and Chinesta, Francisco and Ammar, Amine and Mazabraud, Philippe and Tcharkhtchi, Abbas and Bellenger, Véronique |
| Ecole Doctorale: | ED 432 ECOLE DOCTORALE SCIENCES DES METIERS DE L'INGENIEUR |
| Discipline: | Mécanique et matériaux |
| Collection (Fonds): | Arts et Métiers ParisTech (ENSAM) |
| Institution: | ENSAM |
| Department: | Laboratoire d'Ingénierie des Matériaux |
| Subjects: | 4. Materials Science, Mechanics and Mechanical Engineering |
| Uncontrolled Keywords: | Rotomoulage réactif, Résine époxy amine, Rhéocinétique, Gélification, diagramme TTT, écoulement à surface libre, Sph, Reactive rotational molding, Epoxy, Amine resins, Crosslinking mechanism, Gelation, TTT diagram, Free surface flow simulation, Sph |
| ID Code: | 3668 |
| Deposited By: | Eskandar Mounif |
| Deposited On: | 19 May 2008 |
Repository Staff Only: edit this item