Analyse des propriétés physico-chimiques de résines époxy biosourcées

Epoxy resins are widely used today as composite matrices. They have excellent properties that enable them to be indispensable in many fields of activity. However, in a context of climatic awareness, their recycling difficulties and the toxicity of some of their components push researchers to develop biosourced epoxy resins. This thesis studies the physico-chemical characteristics of two epoxy resins using the DSC, DMA TGA, FTIR characterization techniques and a rheometer and chooses one of them, the most adapted to the RTM, to determine a suitable curing cycle. This cycle is based on a TTT diagram designed by analyzing the rheological behavior and kinetics of crosslinking of the epoxy system. Finally, this work analyzes the impact on performance of the addition of 3\% of nanotubes of neat or chemically modified halloysite. The dispersion is not affected by the treatment of nanotubes. The kinetics are slightly slowed down and the crosslinking level is lower with the filler. Nanotubes delay the increase of the viscosity of the system and the low filler content does not impact the thermal stability and the storage modulus is slightly higher with the addition of the filler.