Strain-induced crystallization of crosslinked natural rubber as revealed by X-ray diffraction using synchrotron radiation

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タイトル別名
  • Strain induced crystallization of crosslinked natural rubber as revealed by X ray diffraction using synchrotron radiation
  • Special issues: Progress in structure analyses of polymeric materials by synchrotron radiation and neutron beam
  • Special issues Progress in structure analyses of polymeric materials by synchrotron radiation and neutron beam

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説明

Strain-induced crystallization (SIC) of natural rubber (NR) has been extensively studied even before the advent of macromolecular physics. However, there are still some unsolved basic issues in this field. In this review article, classic studies on SIC of NR are briefly introduced, and then recent results by synchrotron X-ray diffraction studies in separate papers by different authors are categorized and interpreted on the basis of molecular models. Cyclic deformation experiments provided information on partial orientation of the network-chains, on nucleation and morphological changes of crystals and on stress field around the strain-induced crystals. On the other hand, experiments under constant strain provided information on kinetics of SIC, on stress relaxation due to SIC, and so on. The experimental results could be explained under the assumption that the SIC is dominated by strain, and that the crystals are of folded-chain type. However, in order to consistently explain the various experimental results, we have to establish a unified molecular model of the network structure.

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