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Assessment of the influence of electric arc furnace slag as a non-conventional filler for Nitrile Butadiene Rubber

TitoloAssessment of the influence of electric arc furnace slag as a non-conventional filler for Nitrile Butadiene Rubber
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2023
AutoriGobetti, Anna, Cornacchia Giovanna, La Monica Marco, Zacco Annalisa, Depero Laura Eleonora, and Ramorino Giorgio
RivistaResults in Engineering
Type of ArticleArticle
Parole chiaveButadiene, Cross-link densities, Cyanides, Differential scanning calorimetry, Digital storage, Dynamic mechanical, Dynamic mechanical characterization, Electric arc furnace slags, Electric arcs, Electric furnaces, Filled polymers, Fillers, Hydrodynamic effect, hydrodynamics, Low-costs, Mechanical characterizations, Nitrile butadiene rubber, Payne-effects, Polymer blends, Rubber, Slags

Reinforcement of polymers by the addition of particles filler is a complex phenomenon that depends mainly on the hydrodynamic effect and a complex interplay between polymer, filler, and interfacial region. Mineral fillers are usually adopted as low-cost extenders due to their lower cost. In this study, the influence of a waste material such as electric arc furnace steel slag is assessed as filler for Nitrile-Butadiene Rubber following experimental procedures and analytical calculations adopted for traditional fillers. It was found that the slag content affects the static and the dynamic properties by increasing the material's capability to storage and dissipate energy. In addition to an important contribution of the hydrodynamic effect, the presence of an increasing immobilized rubber fraction around the slag particles (quantified by a differential scanning calorimetry analysis) plays a central role. The slag stiffens the NBR composite; the increase of static tensile and dynamic shear storage moduli was found to be consistent with the Halpin-Tsai and Guth-Gold prevision models respectively. Moreover, the non-linear dynamic behavior was found to be well-fitted by the Kraus equation models. The reinforcing ability of the slag particles as filler was confirmed by the negative slope of the Kraus plot on swelling data. © 2023 The Authors


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