Relationship between Morphology and Viscoelastic Behavior of Rubber Nanocomposites Having Different Levels of Nano Organoclay

In this work, nanocomposites based in SBR were prepared containing different nano clay contents, at various processing conditions, and Relationship between morphology and viscoelastic behavior of compounds were studied. At certain processing conditions, samples with lower nano clay content had more exfoliated morphology while by increasing the content, the accumulation of nano clay layers became intensive. As the nano clay level increased, shear modulus increased, the viscoelastic linear region became smaller and the critical strain decreased. Increasing in processing time and temperature, both lead to a wider linear viscoelastic region. The storage modulus of compounds versus the frequency, increased with increasing nano filler loading. However, by variation in the processing conditions, the rheological behavior changed at different frequencies. At lower frequencies. Exfoliated nano composites had the greater modulus, in contrast, at higher frequencies, accumulated compounds showed a higher modulus.