Investigation of Rheological behaviour and Viscoelastic Properties of NBR/PVC blend

Blends of acrylonitrile-butadiene rubber (NBR) and poly (vinyl chloride) (PVC) were produced by internal mixer. In this present study, the rheological behaviour of NBR, PVC and NBR/PVC blends was studied. Zero-shear viscosity was determined by least squares fits by using a modified Carreau viscosity model. The effect of PVC concentrationon zero shear viscosity and elasticity of NBR/PVC blends was determined experimentally. The results showed thatdynamic rheological properties depend on the composition of the blends. PVC concentration effect agrees well withpredictions made by using the Tsenoglou model. It is inferred from this research that the transition from Newtonian to pseudo plastic flow for NBR/PVC blends and pure PVC started at frequencies lower than that for pure NBR. The shift toward lower frequencies increased with increasing PVC concentration.

کلیدواژه ها:

NBR ، vinyl chloride ، viscosity ، rheological