Abstract
Temperature dependence of storage modulus was studied as a function of structural changes of black filled rubber systems. Above 10°C, the storage modulus (E') of black filled rubber systems decreased with increasing a temperature. The change was dependent on the content and grade of carbon black in the filled rubber systems. NMR results revealed that black filled rubber system had a multi-component system depending on the mobility of rubber molecules, which was a function of temperature. The amount of less mobile rubber component decreased with increasing the temperature without noticeable changes in the mobility. The temperature dependence of the E' was affected by the amount of less mobile rubber molecules which was primarily determined by the specific surface area of carbon black. The relation between occluded rubber structure and less mobile rubber component was also discussed. Based on the results, the structural changes of occluded rubber with temperature were proposed.
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