The effect of ESO presence on the mechanical properties, toughness andstress relaxation of a three-dimensional dynamic epoxy network

Incorporating Schiff base bonds into epoxy networks introduces the reprocessability and stressrelaxation properties into the composites. Schiff bases, known for their dynamic covalent bonds, canundergo reversible reactions. This allows the epoxy network to be reprocessed multiple times withoutsignificant loss of mechanical integrity. When epoxidized soybean oil (ESO) is introduced at ۲۰%into the epoxy network, the tensile strength and modulus of the composite slightly decrease due tothe plasticizing effect of ESO, which reduces the brittleness of the epoxy. However, the toughness ofthe material is improved. ESO enhances the flexibility and energy dissipation of the epoxy network,causing a reduction in activation energy for relaxing stresses.

کلیدواژه ها:

Green ، Sustainable ، and Biopolymers ، Epoxy ، Schiff Base ، Vitrimers.