Strain-Induced Crystallization of Cross-Linked Rubber

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  • 架橋ゴムの伸長結晶化
  • カケハシ ゴム ノ シンチョウ ケッショウカ

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Abstract

Strain-induced crystallization of cross-linked rubber significantly affects its strength and mechanical properties. To date, theories on the thermodynamic equilibrium of strain-induced crystallization have been proposed. However, the effects of the crosslinking density from these theories are not consistent with the experimental results. Recent experiments using synchrotron radiation led to a better temporal and spatial resolution. Time constants of strain-induced crystallization could be estimated and a quantitative discussion about the relationship between strain and crystallization rate became possible. At the same time, the stress relaxation of cross-linked rubber at a fixed length was found to be mainly due to strain-induced crystallization. These new experimental results are also inconsistent with the thermodynamic theories. In order to explain the experimentally obtained data of the strain-induced crystallization, a heterogeneity of the network structure must be considered. As a result of the recent studies, a more detailed understanding of the reinforcing effect by strain-induce crystallization is becoming possible.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 71 (11), 493-500, 2014

    The Society of Polymer Science, Japan

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