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How Carbon Black Affects Cut and Chip Resistance

  • 发布时间:2023-09-27
  • 发布者: 超级管理员
  • 来源: 本站
  • 阅读量:168

  The phenomena of chipping and chipping wear are intricate and distinct from typical road wear. The current challenge lies in comprehending and fine-tuning the pivotal parameters. From the perspective of carbon black, there are generally three facets to enhance the cut and chip resistance of a rubber compound: surface area, structure, and surface activity.

  Surface Area: Finer grades yield a greater surface area for rubber molecules to adhere to. This leads to heightened energy dissipation, forming a barrier for the crack tip or tear to advance.

  Surface Activity: This pertains to the quantity of volatile oxygen groups on the carbon black's surface. The less active the surface is, or the more "inactive" it is, the more freely rubber molecules can move and slide on the carbon black surface, generating friction. This friction also serves as a source of energy dissipation, retarding the progression of cracks or tears.

  Structure: A lower structural grade significantly augments the intrinsic tear strength. Unlike surface area and surface activity, the exact mechanism driving this phenomenon is somewhat less apparent. One hypothesis is that with a lower structural grade, there is less rubber confined within the filler aggregates. This allows the compound to stretch further before reaching a breaking point. This presents a way to optimize "resilience".