Synthèse d'un Matériau Hybride Polyimide/Silice - Etude Structure-Proprietes

TL;DRAbstract

This work consisted to synthesize a hybrid material polyimide/silica by Sol-Gel process. The preparation of these materials has a problem of compatibility between the phases organic and inorganic. Silica and polymer do not have particular affinity and tend to create strong phase segregation. To avoid this phenomenon several solutions were reported in the literature, like the use of coupling agent. In our case, we reduced this phenomenon by creating covalent bonds between polyimide and silica. For that, we fixed along the backbone of polyimide some functions alkoxysilanes which are reactive with silica, functions. These functions will react with silica during the Sol-Gel process. We varied various parameters such as the grafting rate between polymer and silica, or catalyst used at the time of the Sol-Gel process. The continuation of work consisted in studying the various morphologies obtained according to the evolution of the parameters of synthesis. For that, we used various techniques

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