Laboratoire MAPIEM (EA 4323)

Matériaux Polymères Interfaces Environnement Marin

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Development and characterization of composite materials: nano/macro correlation of matrix/ reinforcing properties and wet aging behavior

ASSENGONE OTOGO BE Sigrid
Durability & Functional materials - Interfaces/Interphases: Ageing and Adaptability (IIAA)

Abstract

Fiberglass and epoxy resin composite is one of the most popular materials in the industry and everyday life. To obtain a composite with the best properties, the fiber / resin interface plays an inevitable role. However, the characterization of the properties of the interface is limited because of the shape of the fiber and the difficulty of the preparation of the interface without altering the material. At the same time and despite scientific and technological progress, the expected result depends on the experimental method used, the applied model, or sometimes the analytical scale...Examination of the properties mentioned above and the understanding of the mechanisms of degradation and the kinetics of aging thus make it possible to envisage solutions to improve the quality and the lifetime of a composite part. The present thesis subject will therefore extend this recognition at national and international level. The general approach of this project is divided into three main parts: The first part consists of developing, within the laboratory, a methodology for producing a composite material based on thermosetting polymer with glass fibers as reinforcements. Surface treatments will be considered on model substrates characterized chemically and physically before deposition of the polymer. The goal is to recreate model interphases. The second part consists in evaluating the thermal, mechanical, thermomechanical and structural properties of materials developed at the microscopic and macroscopic scale. The third part will consist of studying the evolution of these model materials and their interphases as a function of wet aging