Vol. 80 No. 4 (2021)
INGREDIENTS

EFFICIENCY OF ANTIOXIDANTS TO STABILIZATION OF BUTADIENE/ISOPRENE CIS-1,4-COPOLYMER

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  • Ye. Senderskaya,
  • G. Chernyavskiy,
  • Ye. Levkovskaya,
  • Ye. Novikova
Ye. Senderskaya
Federal State Unitary Enterprise S.V.Lebedev Institute for Synthetic Rubber (FSUE «ISR»)
G. Chernyavskiy
Federal State Unitary Enterprise S.V.Lebedev Institute for Synthetic Rubber (FSUE «ISR»)
Ye. Levkovskaya
Federal State Unitary Enterprise S.V.Lebedev Institute for Synthetic Rubber (FSUE «ISR»)
Ye. Novikova
Federal State Unitary Enterprise S.V.Lebedev Institute for Synthetic Rubber (FSUE «ISR»)
DOI: https://doi.org/10.47664/0022-9466-2021-80-4-186-190

Published 2021-08-22

Keywords

  • synthetic butadiene-isoprene rubber (SKDI-24),
  • molecular-mass distribution,
  • viscosity,
  • gel,
  • antioxidant,
  • thermal-oxidation
    • ...More
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How to Cite

[1]
Senderskaya Е., Chernyavskiy Г., Levkovskaya Е. and Novikova Е. 2021. EFFICIENCY OF ANTIOXIDANTS TO STABILIZATION OF BUTADIENE/ISOPRENE CIS-1,4-COPOLYMER. Kauchuk i Rezina. 80, 4 (Aug. 2021), 186–190. DOI:https://doi.org/10.47664/0022-9466-2021-80-4-186-190.

Copyright (c) 2021 Kauchuk i Rezina

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Abstract

Effect of antioxidant (AO) nature and concentration (C) on thermal-oxidative stability (TS) in air at 140 °C has been studied for cis-1,4-copolymer of butadiene/isoprene (SKDI-24) samples at varied aging times t (to 4hs). TS values of novel AO Novantox 8PFDA and Irganox 1520L were compared to TSs of currently in use Agidol 1 and Agidol 2. An estimated amount of AO in hexane was added with stirring to SKDI-24 polymerizate in argon flow. SKDI-24 microstructure was estimated by IR-spectroscopy (Spectrum-100 Perkin-Elmer), SKDI-24 molecular-mass distribution by GPC («Waters Breeze»), AO contents of the samples by spectrophotometry (SF-56), gel content and swelling index in the samples – by gravimetry (Vibra AF-R220CE). The data have been presented on change in stability coefficient as the ratio of intrinsic viscosities before and after aging, as influenced by C and t. Novantox 8PFDA and Irganox 1520L are shown to be the most effective AOs. Optimum C values have been determined to stabilize SKDI-24. Mechanism of new AOs action is discussed.

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