This paper evaluates various reinforcement strategies for rubber materials and highlights sulfur crosslinking as an optimal approach. Comparisons between fillers, resins and sulfur crosslinking reveal the advantages of sulfur crosslink in terms of modulus softening and hysteresis in rubber compounds.
Technical Notebook: Unlocking the potential of sulfur as a reinforcing strategy in rubber compounds
Two practical tire compound examples (belt and apex) demonstrate the comprehensively balanced rubber performance with a resin system replaced with high sulfur loading. The introduction of the highly stable sulfur allotrope cyclododecasulfur (S12) further addresses the limitations associated with high sulfur loading, resulting in the potential for increased sulfur loading in rubber compounds.
These research findings provide valuable insights for compounders to optimize rubber product performance.