Frozen non-equilibrium structure for anisotropically deformed natural rubber with nanomatrix structure observed by 3D FIB-SEM and electron tomography

Lina Fukuhara, Kenichiro Kosugi, Yoshimasa Yamamoto, Hiroshi Jinnai, Hideo Nishioka, Hiroyuki Ishii, Masao Fukuda, Seiichi Kawahara

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Effect of frozen non-equilibrium structure for anisotropically deformed natural rubber with the nanomatrix structure on mechanical properties was investigated with respect to morphology analysis through 3D observation. Natural rubber with the nanomatrix structure was prepared by graft copolymerization of styrene onto natural rubber particles in latex stage followed by coagulation of the resulting latex. The morphology was observed by electron tomography and focused ion beam-scanning electron microscopy (FIB-SEM). The nanomatrix structure in isotropic state was precisely analyzed by electron tomography and synchrotron scattering technique. The nanomatrix structure was found to consist of natural rubber particles and polystyrene nanoparticles. The frequency-independent loss tangent at plateau region was attributed to the discontinuous nanomatrix structure. After annealing at 403 K and 7 MPa, the nanomatrix became continuous, which resulted in the increases in stress at strain of one and storage modulus as well as increase in loss tangent.

Original languageEnglish
Pages (from-to)2555-2563
Number of pages9
JournalColloid and Polymer Science
Volume293
Issue number9
DOIs
Publication statusPublished - 2015 Sep 13

Keywords

  • Electron tomography
  • FIB-SEM
  • Nanomatrix structure
  • Natural rubber
  • Non-equilibrium structure

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

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