PVC and ENRN based TPEs were prepared in the mixing chamber of a Brabender Plasticorder, ENRN is the ENR produced after the major modification of the ＇＇Old＇＇ ENR (ENRO) production process, Unaged and aged blends were characterized by means of FTIR, tensile properties, tear strength, hardness and dynamic mechanical analysis (DMA) and compared with those of the ENRO, The improvement in all properties suggest that the ENRN can be used to make stable TPEs which are much less sensitive to thermo-oxidative ageing and other agents of degradation at ambient conditions, DMA-studies gave a single T-g reaffirming the earlier studies of miscibility, The decrease in T-g with increased plasticizer concentration is an indication of the effectiveness of DOP while the increase in tan delta maximum signify increased damping.