Vol. 80 No. 5 (2021)
RUBBERS (CAOUTCHOUC)

MECHANODESTRUCTION OF ISOPRENE RUBBER. PART 3. KINETICS OF OXIDATIVE DESTRUCTION

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  • V. Dorozhkin,
  • Ye. Mokhnatkina,
  • D. Zemskiy,
  • A. Valiev
V. Dorozhkin
Nizhnekamsk Institute of chemical technology (branch) of the Federal state budgetary educational institution of higher education «Kazan national research technological University»
Ye. Mokhnatkina
Nizhnekamsk Institute of chemical technology (branch) of the Federal state budgetary educational institution of higher education «Kazan national research technological University»
D. Zemskiy
Nizhnekamsk Institute of chemical technology (branch) of the Federal state budgetary educational institution of higher education «Kazan national research technological University»
A. Valiev
Nizhnekamsk Institute of chemical technology (branch) of the Federal state budgetary educational institution of higher education «Kazan national research technological University»
DOI: https://doi.org/10.47664/0022-9466-2021-80-5-230-234

Published 2021-10-20

Keywords

  • isoprene rubber,
  • oxidative destruction,
  • kinetics of the process,
  • activation energy,
  • molecular weight,
  • oxygen diffusion
    • ...More
    Less

How to Cite

[1]
Dorozhkin В., Mokhnatkina Е., Zemskiy Д. and Valiev А. 2021. MECHANODESTRUCTION OF ISOPRENE RUBBER. PART 3. KINETICS OF OXIDATIVE DESTRUCTION. Kauchuk i Rezina. 80, 5 (Oct. 2021), 230–234. DOI:https://doi.org/10.47664/0022-9466-2021-80-5-230-234.

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

Continuation of studies of changes in molecular parameters, in particular, the molecular weight (MM) during the plasticization (P) of SKI-3 isoprene rubber. The kinetics of oxidative destruction (OD) in the temperature range (T) 30-130 °C and time (t) 30–600 s were studied in detail. Plasticization of rubber, as before, was carried out in a laboratory rubber mixer of the company «NFM», and gel chromatographic studies were carried out on a gel chromatograph of the company «Waters». The speed constant OD K0 decreases in absolute value with a decrease in T and an increase in t. The calculated effective activation energy of OD Eeff decreases from 24,4 to 13 kJ/mol in the studied t range. The influence of the oxygen diffusion process on the kinetic features of the OD of SKI-3 at Р is pointed out.

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