Rheology and Viscoelastic Behavior of MWCNT-Reinforced EPDM/SBR Nanocomposites

This study investigates the rheological behavior of ethylene propylene diene monomer (EPDM)/styrene butadiene rubber (SBR) nanocomposites reinforced with varying loadings of multi-walled carbon nanotubes (MWCNTs), ranging from ۰ to ۴ phr (parts per hundred rubber). The focus of the research is on understanding the effects of MWCNT concentration on the viscoelastic properties of the EPDM/SBR matrix under dynamic conditions. Rheological tests were conducted using a frequency sweep analysis over a range of ۰.۵ Hz to ۳۵ Hz to examine the material's response in both the linear viscoelastic region and beyond. The results reveal significant changes in the storage modulus (G') and loss modulus (G'') with increasing MWCNT content, indicating a marked reinforcement effect, particularly at higher frequencies. As the MWCNT loading increases, the nanocomposites exhibit enhanced stiffness and elastic behavior, reflecting improved filler-matrix interactions. These findings suggest that the introduction of MWCNTs into EPDM/SBR blends improves their rheological performance, making them suitable for advanced applications requiring enhanced mechanical stability and flow properties.

کلیدواژه ها:

Polymer Nanocomposite ، SBR/EPDM ، Rheological behavior ، Rubber Blend ، CNT