Abstract EN:

The aim of this work is to try to understand the influence of the interfaces and interphases (surface treatment of the reinforcements), and the morphology of the material on the mechanical behavior (viscoelastic and plastic) of particulate composites with a polymer matrix. So, adding to DGEBA/IPD matrix, three type of the composite materials have been studied: -Composites with DGEBA/IPD matrix- non treated glassy beads, -Composites with DGEBA/IPD matrix- aminosilane-treated fillers (interface), - Composites with DGEBA/IPD matrix- elastomer coated glassy beads based on a layer of CTBN-IPD-DGEBA (interphase), The mechanical properties of these materials have been studied by mechanical spectroscopy and by compression technics. The analysis and the interpretation of viscoelastic properties are based on the molecular mobility, physical model of the Perez and al. , and in the other hand on the self-consistent model (homogenisation) developed by Hervé and Zaoui. The contribution of this study in comprehension of the mechanical properties (viscoelastic and plastic) is double: i) considering the real morphology of the composites (spatial distribution of glass particles) in the self-consistent mode!. The model of Hervé and Zaoui was completed to prediction correctly the dynamics response. Ii) physical modelling of the polymeric matrix and mechanical modelling of the composites based on the local stress concentration for best comprehension of the mechanical behaviour on the large deformation and at high stress.