Polyethylene-polystyrene gradient polymers III. Mechanical and rheo-optical studies of relaxation processes

In this paper the structure correlation of PE-PS gradient polymers, modified by styrene LDPE films with their mechanical and rheo-optical properties, is presented. The specific structural changes of both the investigated materials can be demonstrated by using dynamic mechanical deformation studies. The influence of the penetrant on LDPE crystalline and amorphous phase order is shown. Some interesting mechanical behaviour of the gradient polymers, depending on the polystyrene contents, is discussed.