Etude de la viscosité dynamique complexe de quelques mélanges de polybutène-1 et de polypropène

Studies have been made on the dynamic oscillation and static properties in the molten state of blends from polybutene-1 and polypropene. Measurements were made with a balance-rheometer system Dr. Kepes and a capillary viscosimeter. Three experimental parameters, η₀, τ₀ and h have been determined. Steady shear and oscillatory shear viscosity data have been compared. A plot of intrinsic viscosity vs. composition of blends shows a minimum. Variation of η₀ and τ₀ with temperature follow the Arrhenius law but h does not depend on temperature.