Retardation of polymer oxidation by natural antioxidant gossypol. II: Abnormal effects of sulphide and other additives

The effects of dilauryl thiodipropionate, heptadecane, and phenyl benzoate on polypropylene oxidation in the presence of gossypol have been studied. It has been demonstrated that dilauryl thiodipropionate increases the antioxidant effectiveness of gossypol, provided the latter is used in small conce...

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Published in:Polymer degradation and stability 1992, Vol.35 (3), p.229-233
Main Authors: MAR'IN, A. P, SHLYAPNIKOV, Y. A, MAMETOV, E. S, DZHALILOV, A. T
Format: Article
Language:English
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Applied sciences
Chemical reactions and properties
Degradation
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
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container_title Polymer degradation and stability
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creator MAR'IN, A. P
SHLYAPNIKOV, Y. A
MAMETOV, E. S
DZHALILOV, A. T
description The effects of dilauryl thiodipropionate, heptadecane, and phenyl benzoate on polypropylene oxidation in the presence of gossypol have been studied. It has been demonstrated that dilauryl thiodipropionate increases the antioxidant effectiveness of gossypol, provided the latter is used in small concentrations. If gossypol is used in high concentrations, its effectiveness is reduced by sulphide. In this case the curves of the dependence of induction period or of oxygen consumption rate on sulphide concentration will show both maxima and minima. It is supposed that these additives exert similar effects on the polymer structure and on the antioxidant distribution in the polymer.
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subjects Applied sciences
Chemical reactions and properties
Degradation
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
title Retardation of polymer oxidation by natural antioxidant gossypol. II: Abnormal effects of sulphide and other additives
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