A functional polymer which promotes compatibilization between polyolefins and polar polymers such as ethylene vinyl alcohol (EVOH), polyamide and blends of polar polymers. RETAIN™ 3000 functions to enhance the dispersion of the polar polymers into the polyolefin matrix such that the haze of the resulting structure is minimized. The utility may be achieved where the polyolefin is either a polyethylene or polypropylene.