Vol. 80 No. 6 (2021)
RUBBERS (CAOUTCHOUC)

Mechanodestruction of Isoprene Rubber. Part 4. Kinetics of Recombination

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  • V.P. Dorozhkin ,
  • E.G. Mokhnatkina,
  • D.N. Zemsky,
  • A.D. Valiev
V.P. Dorozhkin
Nizhnekamsk Institute of chemical technology (branch) of the Federal state budgetary educational institution of higher education «Kazan national research technological University»
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E.G. Mokhnatkina
Nizhnekamsk Institute of chemical technology (branch) of the Federal state budgetary educational institution of higher education «Kazan national research technological University»
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D.N. Zemsky
Нижнекамский химико-технологический институт (филиал) федерального государственного бюджетного образовательного учреждения высшего образования «Казанский национальный исследовательский технологический университет»
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A.D. Valiev
Nizhnekamsk Institute of chemical technology (branch) of the Federal state budgetary educational institution of higher education «Kazan national research technological University»
Bio

Published 2022-03-15

Keywords

  • isoprene rubber,
  • plasticization,
  • recombination of macroradicals,
  • kinetics of the process,
  • activation energy,
  • molecular mass
    • ...More
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How to Cite

[1]
Dorozhkin В., Mokhnatkina Е., Zemsky Д. and Valiev А. 2022. Mechanodestruction of Isoprene Rubber. Part 4. Kinetics of Recombination. Kauchuk i Rezina. 80, 6 (Mar. 2022), 286–289.

Abstract

Continuation of studies of changes in molecular parameters and kinetics of the processes, accompanying the plasticization (P) of SKI-3 isoprene rubber. The kinetics of recombination of macroradicals (RM) formed during destruction in the temperature range (T) 30–130 0C and time (t) 30-600 s were studied in detail. The plasticization of rubber, as before, was carried out in a laboratory rubber mixer of the company «NFM», and the determination of molecular characteristics on a gel chromatograph of the company «Waters». Kр, the rate constant of RM, decreases with the lowering of T and increase of t, the effective activation energy of the RM process decreases from 9.7 to 0.42 kJ/mol. Data on changes in the fractions of macromolecules subjected to recombination and the values of their molecular weights were also obtained. It is suggested that the chemical nature of macroradicals changes during P of SKI-3.

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