Preparation of silica-supported 2-mercaptobenzimidazole and its antioxidative behavior in styrene-butadiene rubber

Advanced ultra‐high molecular weight polyethylene/antioxidant‐functionalized carbon nanotubes nanocomposites with improved thermo‐oxidative resistance

“…In particular, venations and aggregates of few tens of microns in size penetrate the HC films irrespective of the CNT functionalization, while much bigger clusters are noticed in the MM processed samples. As discussed in the next section, the resulting agglomerates probably nullify most of the stabilizing effect of the AO molecules grafted onto the inner nanoparticles as previously, which are, as a consequence, not exposed to the surrounding polymer.…”

“…Such a noticeable effect of stabilization of the matrix was probably achieved thanks to the immobilization of the AO moieties on the CNTs sidewalls combined with an optimization of the dispersion. In this way the aggregation between the AO molecules is controlled (considering also the low amount), the migration and volatilization are avoided and, the AO action is much more effective than in case of simply mixing with the unfilled matrix …”

“…Among the possible functionalizing agents, antioxidant (AO) molecules are receiving particular attention. The reason is that AO immobilization onto a nanosized substrate allows to elude issues related to the physical loss by volatilization, migration or water extraction . In addition, the antioxidant activity can be optimized because the grafted AO is located at the polymer‐particle interface, i.e., exactly where the local increase of the mechanical stresses experienced during compounding may generate oxidized species, thus promoting polymer degradation.…”

Effects of modified silica on the co‐vulcanization kinetics and mechanical performances of natural rubber/styrene–butadiene rubber blends

“…Moreover, aggregate and agglomerate formations of filler particles in rubber matrix are usually ineluctable, and modified filler are more attractive for practical rubber products. Recently, the authors used rubber additives to modify rigid fillers and proposed the concept of supported rubber additives (including supported antioxidant, vulcanization accelerator, and crosslinking agent) . To the best of the authors' knowledge, there were very few works about the effects of rigid fillers, especially silica, on the vulcanization behavior of the individual rubber phase in rubber blends.…”

Synthesis of polybutadiene-silica nanoparticles via differential microemulsion polymerization and their hydrogenated nanoparticles by diimide reduction

“…The chlorosilane-modified silica grafted with 2-mercaptobenzimidazole]. (MB) was prepared as a novel antioxidant in styrene-butadiene rubber [4]. The hydrogenated acrylonitrile butadiene rubber (HNBR) composites filled with fumed silica was prepared to improve their ablation performance and thermal stability [5].…”