Abstract
The influence of filler selective distribution on the strain softening behaviors (Payne and Mullins effects) has been seldom studied for ternary rubber nanocomposites. Herein selected distribution of carbon black (CB) in the CB/isoprene rubber (IR)/nitrile rubber (NBR) nanocomposites is regulated simply by varying compounding sequences. The location of CB does not significantly influence the Payne effects and slightly influences the Mullins effect in the first cyclic tension run. However, it influences the Mullins effect of the demullinized nanocomposites (in the third deformation runs) markedly, and the CB concentration in the crystallizable IR phase tends to improve damping ratio at high strains. The influence of CB selective localization on the Mullins effect involves the strain-induced crystallization of the IR phase. For tensile performances, the CB concentration in the IR and NBR phases tends to improve strain hardening at high strains and stress at low strains, respectively. This work provides a way to tailor the strain softening and tensile behaviors of the ternary rubber nanocomposites by control of the filler selective dispersion.
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