Nanographene oxide (GO) is used to improve the physical properties of blends of ethylene-propylene-diene monomer (EPDM) rubber/styrene-butadiene rubber (SBR) nano-composites compared with modi ed nanographene oxide (mGO). The modi ed Hummers method was used to develop the GO. GO was treated using two types of surface modi ers, 4,4'-diphenylmethane diisocyanate (MDI) and 3-Aminopropyltriethoxysilane coupling agent (KH550), and then incorporated into an EPDM/SBR rubber matrix at different concentrations, processed with an open-mill mixer, and vulcanised. The in uence of mGO concentration on EPDM/SBR nanocomposites' swelling and compression set behaviour was investigated in this paper. Comparative analysis was done on the outcomes of various compositions for EPDM/SBR-GO and EPDM/SBR-mGO with nano ller at 0, 2, 4, 6, 8 and 10 phr. In both GO-lled nanocomposites and mGO-lled nanocomposites, the increase in mGO loading is associated with a signi cant reduction in mole percent uptake while the compression set increases, according to the current study. In mGO-lled nanocomposites, this phenomenon is more evident than in GO-lled nanocomposites. The effect of the conditioning environment on the characteristics under investigation is clearly distinguished in this study. Swelling resistance and compression set are improved in nanocomposites containing KH550 modi ed GO.