Synthesis of Complex Hindered Phenol Antioxidant and Its Scavenging Activity for DPPH Free-Radicals

doi:10.19491/j.issn.1001-9278.2019.12.013

Abstract

Abstract: In this work, a complex hindered phenol antioxidant, (2-Hydroxy-3-tert-butyl-5-methylbenzyl)-4-methyl-6-tert-butylphenyl-diphenylphosphite］,was synthesized by using diphenyl-phosphonium chloride and 2,2′-methylenebis-(4-methyl-6-tert-butylphenol)as raw materials, and a yield of 65.12 % was achieved from the synthetic process. The molecular structure of the obtained product was characterized by FTIR and then confirmed to be in accordance with the configuration design. A comparative investigation on the thermal stability and scavenging capability for DPPH free radical was carried out between the synthesized product and a commercial antioxidant, 2,6-di-tert-butyl-4-methylphenol (BHT). The results indicated that the synthesized product had a higher molecular weight and better thermal stability than BHT, and it exhibited a good scavenging effect on DPPH free radical, indicating a better antioxidant capability compared to BHT.

Key words: hindered phenol, phosphite, complexantioxidant;free radical

CLC Number:

TQ314.249

JI Haifeng, SONG Danyang, YAN Yushuang, WANG Weidong. Synthesis of Complex Hindered Phenol Antioxidant and Its Scavenging Activity for DPPH Free-Radicals[J]. China Plastics, 2019, 33(12): 69-72.

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