Synergistic reinforcement ofNBRby hybrid filler system including organoclay and nano‐CaCO₃

Abstract

Rubber nanocomposites containing one type of nanofiller are common and are widely established in the research field. In this study, nitrile rubber (NBR) based ternary nanocomposites containing modified silicate (Cloisite 30B) and also nano-calcium carbonate (nano-CaCO 3 ) were prepared using a laboratory internal mixer (simple melt mixing). Effects of the hybrid filler system (filler phase have two kind of fillers) on the cure rheometry, morphology, swelling, and mechanical and dynamic-mechanical properties of the NBR were investigated. Concentration of nano-CaCO 3 [0, 5, 10, and 15 parts per one hundred parts of rubber by weight (phr)] and organoclay (0, 3, and 6 phr) in NBR was varied. The microstructure and homogeneity of the compounds were confirmed by studying the dispersion of nanoparticles in NBR via X-ray diffraction and field emission scanning electron microscopy. Based on the results of morphology and mechanical properties, the dual-filler phase nanocomposites (hybrid nanocomposite) have higher performance in comparison with single-filler phase nanocomposites.

Comparative Study of Bentonite Filled Acrylonitrile Butadiene Rubber and Carbon Black Filled NBR Composites Properties

“…This caused by the activating effect by the increasing filler loading which made liquid absorption into the rubber reduced. The phenomenon was also reported by Salkhord and Sadeghi studies about incorporating the organoclay inside the NBR rubber composites [17]. The comparison between NBR/Bt and NBR/CB composites at similar filler loading shows that NBR/CB composites have lower liquid uptake compared to NBR/Bt composites.…”

Thermal conductivity and dielectric properties of polypropylene‐based hybrid compounds containing multiwalled carbon nanotubes

“…studied the mechanical and thermal properties of hybrid polypropylene (PP) composites with two main types of mineral fillers—calcium carbonate (CaCO 3 ) and Talc, verifying a synergistic hybridization effect in flexural and impact strength when PP/CaCO3/Talc weight ratio was 70/15/15. Salkhord and Sadeghi Ghari analyzed the influence of hybrid fillers, as modified silicate and nanocalcium carbonate (nano‐CaCO 3 ), on mechanical properties of the nitrile rubber (NBR). The dual‐filler phase nanocomposites showed higher performance in comparison with single‐filler phase systems.…”

Modeling of tensile strength in polymer particulate nanocomposites based on material and interphase properties

“…Although small nanoparticles can provide a high interfacial area with the polymer matrix, it is difficult to disperse them in a polymer matrix because they tend to aggregate or agglomerate . Owing to the very high specific area of nanoparticles, they are prone to be attracted to each other by intermolecular van der Waals forces, causing the clusters of agglomerated microparticles to be defects in the nanocomposite .…”