Wide range of products can be manufactured by blending polymers and waste rubbers based on commercial and original resourced polyethylene representing a sustainable way of mechanical recycling. In order to improve the deteriorated mechanical properties and, therefore, stress transfer between the components, experimental olefin-maleic-anhydride compatibilizing additives have been applied for bridge construction between the interfaces of the polymer/rubber phases. On the one hand the effect of incorporation of a waste rubber mixture (ethylene-propylene-diene monomer and ground tyre rubber) have been studied in commercial and waste polyethylene matrix and on the other hand polymer blends based on polyethylene containing polystyrene or polycarbonate have been investigated. It can be concluded that the optimized interface led to the improvement of mechanical properties of the blends such as tensile and impact properties. Morphological behaviour of the blends has been assessed by scanning electron microscopy (SEM). Potential in fitting of the different additive structures to a given type of raw materials might open new doors in the area of polymer blending with special regard to waste sources.