Epoxy resins are wildly used in coating, adhesives, electrical laminates and structural components because of excellent bulk properties such as high modulus and low creep. However, like other thermoset resins, the cross-linking characteristics of cured epoxies produces a highly undesirable property like relatively brittle, poor resistance to crack propagation and low impact strength and low toughness. Using elastomers such as NBR, SBR and silicon is highly recommended for this defect. Nowadays, nanoelastomers are considered for this aim and limited studies are available in this field. In this research paper, cured NBR in form of nanoelastomers is mixed in epoxy resin and its related thermal properties are deeply evaluated. Field emission scanning electron microscopy (FESEM) and atomic force microscopy is first used to investigate the interface morphology. Thereafter, thermogravity analysis (TGA) is employed to evaluated thermal degradation. We performed the tests at different rates and we could evaluate the results; and the effect of nanoelastomers using degradation kinetic constants and their related variations at different nanoelastomer concentrations.