Effect of Temperature on melt behavior of Polyethylene Blends: a Study of Cole-Cole Plots

Small amplitude oscillatory shear rheology is employed to investigate the linear viscoelastic behavior of linear and branched polyethylene blends as a function of temperature. The results reveal that when temperature increases the Cole-Cole plots for the blends become smaller but the form of the plots does not change and there is no additional peak or inception of a tail at high values of η΄ (related to relaxation of interface). This can be owing to: 1) the microstructure of the polyethylene blends is stable towards changes in temperature and 2) the studied blends show a single relaxation mode even though the constituents show different molecular relaxation modes

کلیدواژه ها:

Rheology ، imaginary part and real part of viscosity ، Cole-Cole plot