FUNDAMENTAL STUDIES ON THE DEGRADATION MECHANISM OF RUBBER VULCANIZATES (I)

DOI Web Site 3 References
  • ONO Katsumichi
    The Chemical Research Institute of Non-Aqueous Solutions, Tohoku University
  • KAERIYAMA Akitoshi
    The Chemical Research Institute of Non-Aqueous Solutions, Tohoku University
  • MURAKAMI Kenkichi
    The Chemical Research Institute of Non-Aqueous Solutions, Tohoku University

Bibliographic Information

Other Title
  • 定常状態におけるゴム中への酸素拡散の影響
  • 定常状態におけるゴム中への酸素拡散の影響〔加硫ゴムの劣化反応機構の定量的研究-1-〕
  • テイジョウ ジョウタイ ニ オケル ゴムチュウ エ ノ サンソ カクサン ノ
  • THE EFFECT OF DIFFUSION OF OXYGEN IN THE STEADY STATE

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Description

The effect of diffusion of oxygen on the film thickness of a sample of rubber vulcanizate in chemorheological studies has not been studied so far.<BR>The purpose of the present work is to derive an equation which represents the relation between the rate of chain scission. qav. and the film thickness 2l in the steady state of diffusion and oxidation reaction.<BR>In conclusion, the next equation (1) has been derived which indicates the relation between qav. and 2l.qav·l=Sc0√Dk/ε·tanh(0√k/D·l)(1)<BR>Furthermore, an equation (2) which represents the distribution of oxygen concentrations in the film thickness has been derived.c=Sc0cosh(√k/D·x)/cosh(0√k/D·l)(2)<BR>Here, D: diffusion constant, k: first order rate constant of oxygen consumption, ε: scission efficiency of polymer chains, S: solubility coefficient, C: oxygen concentration, C: oxygen concentration in the air.

Journal

  • NIPPON GOMU KYOKAISHI

    NIPPON GOMU KYOKAISHI 49 (4), 350-354, 1976

    THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN

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