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Effect of rubber component on the performance of brake friction materials

Saffar, A ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.wear.2011.09.012
  3. Publisher: 2012
  4. Abstract:
  5. Various composite friction materials containing 40. vol.% organic binder (phenolic resin plus styrene-butadiene-rubber (SBR)) with varying phenolic-resin/SBR ratio were prepared. The content of phenolic resin in each composite was indicated by the resin value (RV) index ranging between 0 and 100%. The composites with RVs greater than 50% form resin-based friction materials in which the primary binder is the phenolic resin. For RVs less than 50%, the composites become the rubber-based materials where the primary binder is the SBR. The analysis of mechanical properties exhibited that the conformability of the composites increases upon incorporation of SBR. The frictional analysis revealed that type of polymeric binder, i.e. resin or rubber, dominates greatly the frictional behavior of the composites. The increment of friction force and higher improvement in the frictional fade and recovery with sliding velocities are the general features of rubber-based friction materials. It was attributed to the inherent properties of rubber on the viscoelastic response at higher sliding velocities and entropic contribution on the mechanical properties at higher temperatures. The wear rate of resin-based materials and its drum temperature is lower than those of rubber-based materials. It was attributed to the strongly adhered multilayer secondary plateaus formed on the surface of resin-based materials
  6. Keywords:
  7. Polymer-matrix composites ; Wear ; Brake friction materials ; Brake materials ; Entropic contributions ; Friction force ; Frictional behavior ; Higher temperatures ; Organic binders ; Polymeric binder ; Resin-based materials ; Rubber component ; Sliding velocities ; Styrene butadiene rubber ; Viscoelastic response ; Wear rates ; Binders ; Brakes ; Butadiene ; Friction materials ; Mechanical properties ; Phenolic resins ; Phenols ; Polymer matrix composites ; Polymers ; Resins ; Rubber ; Styrene ; Tribology ; Wear of materials ; Friction
  8. Source: Wear ; Volume 274-275 , January , 2012 , Pages 286-297 ; 00431648 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0043164811005941