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Title of Journal: J Therm Anal Calorim

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Abbravation: Journal of Thermal Analysis and Calorimetry

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Springer Netherlands

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DOI

10.1007/0-387-26206-7_3

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1588-2926

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Antioxidant activity of 6PPD derivatives in polyis

Authors: Z Cibulkovő P Šimon P Lehocký J Balko
Publish Date: 2005/05/01
Volume: 80, Issue: 2, Pages: 357-361
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Abstract

The antioxidant activity of selected NNapossubstituted pphenylenediamines derived from 6PPD in polyisoprene matrix has been studied by differential scanning calorimetry DSC under nonisothermal conditions The kinetic parameters describing temperature dependence of induction period have been obtained Protection factors and antioxidant effectiveness have been calculated to characterize the stabilizing effect of the antioxidants under study Using both criteria the highest antioxidant activity has been observed in the case of Dusantox L which is a mixture of 6PPD and its pkumyl derivative Its high antioxidant efficiency can be explained by the synergistic effect of 6PPD and its pkumyl derivative The lowest antioxidant efficiency of okumylderivative of 6PPD is probably caused by the sterical effect of the bulky kumyl group

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