LAUSR

This work reports for the first time the copolymerization studies of eleven newly synthesized epoxidized vegetable oils (EVOs) reacted with a disulfide-based aromatic dicarboxylic acid (DCA) to produce thermoset materials with recyclability properties. These new EVOs reactivity and properties were compared with those of two commercial references: epoxidized linseed oil (ELO) and epoxidized soybean oil (ESO). The structure-reactivity correlation is proposed, by DSC analysis, corroborating the epoxy content of EVOs monomers, the initiators effect, the copolymerization reactions enthalpy and temperature range. The thermomechanical properties of obtained thermosets were evaluated and discussed in correlation with the structure and reactivity of monomers by DMA, tensile testing and TGA. It has been found that higher the EVOs functionality, higher is the reactivity, crosslinking density and final performances, with tan δ values ranging from 34 to 111 °C. The tensile testing of the prepared EVOs thermosets showed properties from hard and rigid to soft and plastic, with some elongations at break from 100 to 340%. The study investigates the chemical recycling and the solvent resistance of these vitrimers-like materials that have a high biobased carbon content, from 80 to 91%, with potential application in coating or composite materials in automotive sector.