mohsen mohammadi - Faculty of Engineering, Qom University of Technology, P. O. Box: 37195-1519, Qom, Iran
alireza azizi - Faculty of Engineering, Qom University of Technology, P. O. Box: 37195-1519, Qom, Iran
ali a. yousefi - Faculty of Processing, Iran Polymer and Petrochemical Institute, P. O. Box: 14965-115, Tehran, Iran
morteza ehsani - Faculty of Processing, Iran Polymer and Petrochemical Institute, P. O. Box: 14965-115, Tehran, Iran

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

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