Abstract
The induction period(IP)and initial rate of polymerization(IRP)of methyl methacrylate(MMA)by BPO(1.0mole%)at 70℃ in the presence of antioxidants and their related compounds were studied by a differential scanning calorimetry.IP at 0.1mole% was as follows, 2, 6-Di-tert-butyl-4-methylphenol>Eugenol>Phenol>Vitamin E>Vitamin A.At the high concentration of 1.0mole%, the IRP of all test compounds decreased markedly, indicating their large interaction with free radicals due to thermal decomposed BPO.Phenolic antioxidants were concluded not to be an inhibitor but a retardant at 1.0mole%.Furthermore, the effects of antioxidants on the IR and IRP by azobisisobutyronitrile(AIBN)and their interaction with diphenyl-p-picrylhydrazyl(DPPH, free radicals)were studied.
