أ.د محمد صلاب حمزة شندوخ
  • A Study of The Effect of Carbon Black Powder on The Physical Properties of SBR/NR Blends Used In Passenger Tire Treads
  • The use of polymer blends is an effective method for altering the performance of
    polymer materials and is widely employed in engineering plastics, rubber, and fiber
    materials. Elastomeric blends are used for many reasons such as lowering the
    compound cost, for ease of fabrication and to improve the performance of the
    industrial rubber. In this study, 20 different rubber compounds were prepared by using
    SMR-20 type of natural rubber and SBR-1502 type of styrene–butadiene rubber in
    different levels (0, 25, 50, 75 and 100 pphr) and each recipe reinforced with carbon
    black at different ratio (20, 40, 60 and 80) pphr (part per hundred). The physical
    properties – such as thermal conductivity, thermal diffusivity, swelling and specific
    gravity were studied. The results show that the thermal conductivity and thermal
    diffusivity increased with increase of loading level of carbon black and these
    properties decreased with the increase of NR to SBR. The swelling property in this
    work measured by change in mass method by immersed the samples in oil and water.
    The swelling in water more than in oil, change in mass of the NR/SBR blends
    increased with immersing time increase and decreased with carbon black increment,
    and with the increment of NR percentages to SBR. The specific gravity increased with
    increase of carbon black loading for all recipes.