Dynamic Properties of Silica-Filled Polyisoprene Rubbers and Their Blends with Polybutadiene Rubber
In this study, data is presented to highlight the special attributes of silica filled polyisoprene polymers (NR,DPNR,IR) and their blends with polybutadiene rubber (BR). Data are presented on the use of silane as a coupling agent, as well as the use of pre-reacted silica in these rubber compounds. Dynamic properties of vulcanizates are measured and the trends observed in tan δ, shear modulus and the filler-filler interactions are discussed. Bound rubber measurements and atomic force microscopy (AFM) methods are used to assess rubber-filler interaction and filler macro- and micro-dispersion. Viscoelastic mapping of the compounds using AFM will be related to data from the dynamic tests and the differences observed in the different isoprene rubbers.