Effect of the textural characteristics of the new silicas on the dynamic properties of styrene‐butadiene rubber (SBR) vulcanizates

Abstract It is possible to obtain silicas with different textural characteristics from natural silicates by means of an acid treatment, where the textural characteristics of the new silicas obtained are greatly influenced by the reaction conditions. The mechanodynamical behavior of compounds filled with these silicas and based on Styrenebutadiene rubber (SBR) matrices was studied. The influence of the textural characteristics on dynamic properties is explained in terms of the stiffness, porosity, and structure of the silica particles. Silicas obtained at drastic reaction conditions yield compounds with a higher storage modulus, E ′, at low strain amplitudes, but with a lower storage modulus at high strain amplitudes. The maximum loss factor, tanδ, is a function of the silica external surface area.