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DSC study of the influence of p-subtituted diphenyl amines on the thermooxidative stability of styrene-butadiene rubber

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Abstract

Effect of several p- and p,p′-substituted diphenyl amines on the thermooxidative stability of styrene-butadiene rubber (SBR) has been studied using non-isothermal DSC measurements with the aim of exploring the relation between the structure of the compound and its antioxidative performance. The treatment of the experimental data was carried out by applying a new method based on a non-Arrhenian temperature function. In order to compare the stabilizing effect of the compounds, protection factors have been calculated from the oxidation induction times. The results achieved document that some functional groups in substituted diphenyl amines modify greatly the antioxidative performance. The groups having a positive mesomeric effect increase dramatically the antioxidant efficiency; the highest increase exhibited the nitroso group. On the other hand, the nitro group with the negative mesomeric effect is responsible for the loss of antioxidative properties. In general, the protection factors of the compounds depend on temperature.

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Acknowledgements

This study was supported by the Slovak Research and Development Agency under the contract No. APVV-0446-07.

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Authors and Affiliations

  1. Institute of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovak Republic

    Zuzana Cibulková & Peter Šimon

  2. Research Institute of Chemical Technology (VUCHT a.s.), Nobelova 34, 836 03, Bratislava, Slovak Republic

    Peter Lehocký, Károly Kosár & Ján Uhlár

Authors
  1. Zuzana Cibulková
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  2. Peter Šimon
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  3. Peter Lehocký
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  4. Károly Kosár
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  5. Ján Uhlár
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Correspondence to Peter Šimon.

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Cibulková, Z., Šimon, P., Lehocký, P. et al. DSC study of the influence of p-subtituted diphenyl amines on the thermooxidative stability of styrene-butadiene rubber. J Therm Anal Calorim 101, 679–684 (2010). https://doi.org/10.1007/s10973-010-0918-2

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  • DOI: https://doi.org/10.1007/s10973-010-0918-2

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