Abstract
ABSTRACTDynamic rheology in combination of fluorescence and molecular weight analysis was carried out to explore annealing‐induced structural evolutions in silica filled polyisoprene rubber (IR) and ethylene‐propylene rubber compounds containing rhodamine B modified silica of 2.5% in volume fraction. The results show that storage modulus of the ethylene‐propylene rubber compounds increases slightly with increasing annealing time while that of the IR compounds exhibits a peaking behavior at mediate silica contents. Fluorescence tests reveal that the silica agglomerates in both compounds while the agglomeration is more significant in the IR ones. Molecular weight analysis shows that IR in the compounds undergoes degradation during the annealing. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46679.
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