Free radical scavenging ability of a novel intramolecular complex antioxidant

Radical scavenging ability of a novel intramolecular complex antioxidant towards 1,1-diphenyl-2-picrylhydrazyl(DPPH·) free radical was studied by uv-vis spectrophotometer,and compared with that of antioxidant BHT and antioxidant 1076.Results showed that the radical scavenging ability of the novel intramolecular complex antioxidant was superior to that of commercial antioxidants BHT and 1076.The scavenging ability increased with the increase of the concentration of the antioxidant,and the scavenging ability increased first and then kept constant afterwards.Temperature has little influence on the reaction rate,which showed that activation energy was lower and this reaction can proceed rapidly at room temperature.The antioxidation performance for polyethylene was evaluated by melt flow rate and oxidation induction time.Results also showed that the antioxidant ability of the synthesized complex antioxidant was superior to the commercial antioxidant BHT and 1076.