However, MAS experiments reveal some inconsistencies in SBR. The SBR phase cross-links to a lesser extent in the blend compared to its single vulcanizate. This is despite its preferential and faster reaction rate with CBS accelerator than that of NR. 17 ). Thus, this highlights the effects of softening and stiffening that should have been observed in the blend but are rather weak. These observations made through MAS also corroborate with the lower defect fraction in the blend observed through the low-resolution experiment. These arguments collectively demonstrate that the two polymers are protected in the blend even at prolonged weathering durations. In other words, under the experimental conditions discussed here, the blend lasts longer and is hence technologically better suitable than the constituent single vulcanizates.