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Journal of the American Oil Chemists Society

, Volume 47, Issue 10, pp 369–370 | Cite as

The effect of antioxidants in the autoxidation of methyl conjugatedcis, trans-octadecadienoates

  • Kazuo Fukuzumi
  • Nobuo Ikeda
Technical

Abstract

The effect of antioxidants on the autoxidation of methyl conjugatedcis,trans-octadecadienoates was evaluated by estimating the induction period by measuring the increase in weight with time. Peroxide values and molecular weights were also used to determine extent of oxidation. UV and IR absorption were measured to determine conjugated dienes and isolatedtrans double bonds. Antioxidants, such as butylated hydroxy anisole (BHA), butylated hydroxy toluene (BHT), propyl gallate (PG) and sesamol, lengthened the induction period as much as seven to twelve times. After autoxidation to a weight gain of 10 mg per 1.5 g, the antioxidant containing samples had higher molecular weights and lower diene contents than the control samples. The induction periods were shorter, the peroxide values lower with or without antioxidants for the conjugated dienoates than for the nonconjugated dienoates. Effect of antioxidants might be explained by the formation of a hydrogen bond of the hydroxyl of the antioxidant and π-electrons as well as the inhibition of the chain-reaction.

Keywords

Induction Period Butylate Hydroxy Toluene Sesamol Propyl Gallate Butylate Hydroxy Anisole 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The American Oil Chemists' Society 1970

Authors and Affiliations

  • Kazuo Fukuzumi
    • 1
  • Nobuo Ikeda
    • 1
  1. 1.Department of Applied Chemistry, Faculty of EngineeringNagoya UniversityNagoyaJapan

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