ESTIMATION OF ANTIOXIDATION ACTIVITY OF ANTIOXIDANT FOR LOW DENSITY POLYETHYLENE BY TG-DTA

Antioxidation activities of various types antioxidants have been evaluated by TG-DTA curves. The results of TG-DTA have showed that the heat stability of the low density polyethylene at high temperature has been very improved by means of adding either N, N′-di-β-naphthyl-p-phenylenediamine or 4-anilino-p-toluene-sulfonailide. It has been also concluded that antioxidation activity of antioxidant at high temperature depends on the stability of radical derived from antioxidant.