NR is the major constituent in the rubber compound used for the tread on the truck tires. A general compound formulation of the tire tread includes NR and BR as polymer base and carbon black as the reinforcing filler, and curative components. In this paper the effects of dual filler system (carbon black and precipitated silica) on the dynamic properties of tire treat has been studied. The results show by increasing of precipitated silica, significant improvement was observed in fatigue resistance, rolling resistance and heat buildup of the tire. Tensile strength and modulus and wet grip of tire tread decrease with increasing of silica in rubber compound formulation.

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In the published article cited above, the following errors were discovered.Page 1278 (top): Figure 1. (a) XRD results of NR75/EPDM25 nanocomposites containing 1, 3, 5, and 7 wt % nanoclay. (b) XRD results of different compositions of NR/EPDM containing 3 wt % nanoclay.The caption was incorrect and should have read: Figure 1. (a) XRD results of NR75/EPDM25 nanocomposites containing 1, 3, 5, and 7 wt % nanoclay. 4 (b) XRD results of different compositions of NR/EPDM containing 3 wt % nanoclay.

The effects of graphene nanoplatelet (GNP) and organoclay montmorillonite (OMMT) on the curing, relaxation, and the mechanical properties of acrylonitrile‐butadiene rubber/polyvinyl chloride (NBR/PVC) nanocomposites were investigated. Scorch and cure times of nanocomposites reinforced with GNP increased, while these parameters for nanocomposites reinforced with OMMT decreased. Maximum torque and cure rate increased after adding the nanoparticles. In the relaxation curves, with increasing nanoparticle and acrylonitrile (ACN) content, both the slopes of short‐ and long‐term regions, raised. Cured compounds have the significantly higher initial and final modulus, the greater elastic slope, and lower viscous slope than the uncured ones. The results of the relaxation test showed that the relaxation percentage in the uncured samples was much higher than the cured ones. Also, with the addition of both GNP and OMMT, this parameter had an upward trend. DGS/DGL parameter increased with the addition of nano‐reinforcements in the uncured state while decreasing in the cured state. For example, the blend containing N3 reinforced via GNP showed an 11% increase in the uncured state, whereas 14% reduction in the cured state. Tensile strength, elastic modulus, and hardness were improved by incorporating nanoparticles, while the effect of GNP was more intense. The similar trend observed in samples with NBR type of higher ACN content. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47550.

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