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In situ transmission electron microscopy observation of the deformation and fracture processes of an epoxy/silica nanocomposite.
Wang, Pangpang; Maeda, Ryusei; Aoki, Mika; Kubozono, Tatsuya; Yoshihara, Daisuke; Shundo, Atsuomi; Kobayashi, Takaya; Yamamoto, Satoru; Tanaka, Keiji; Yamada, Sunao.
Afiliación
  • Wang P; Materials Open Lab, Institute of Systems, Information Technologies and Nanotechnologies, Fukuoka 814-0001, Japan. wang@isit.or.jp.
  • Maeda R; Mechanical Design & Analysis Co., Tokyo 182-0024, Japan.
  • Aoki M; Centre for Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka 819-0395, Japan.
  • Kubozono T; Materials Open Lab, Institute of Systems, Information Technologies and Nanotechnologies, Fukuoka 814-0001, Japan. wang@isit.or.jp.
  • Yoshihara D; Materials Open Lab, Institute of Systems, Information Technologies and Nanotechnologies, Fukuoka 814-0001, Japan. wang@isit.or.jp.
  • Shundo A; Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan.
  • Kobayashi T; Mechanical Design & Analysis Co., Tokyo 182-0024, Japan.
  • Yamamoto S; Centre for Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka 819-0395, Japan.
  • Tanaka K; Centre for Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka 819-0395, Japan.
  • Yamada S; Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan.
Soft Matter ; 18(6): 1149-1153, 2022 Feb 09.
Article en En | MEDLINE | ID: mdl-34989390
Herein, we report the in situ transmission electron microscopy observation of the deformation and fracture processes of an epoxy resin thin film containing silica nanoparticles under tensile strain. Under tensile strain, the dispersed silica nanoparticles in the composite arrest the progress of the crack tip and prevent crack propagation. Concomitantly, the generation and growth of nanovoids at the epoxy matrix/nanoparticle interfaces were clearly observed, particularly in the region near the crack tip. These nanovoids contribute to the dissipation of fracture energy, thereby enhancing the fracture toughness. We also analyzed the local distributions of the true strain and strain rate in the nanocomposite film during tensile testing using the digital image correlation method. In the region around the crack tip, the strain rate increased by 3 to 10 times compared to the average of the entire test specimen. However, the presence of large filler particles in the growing crack suppressed the generation of strain, potentially contributing to hindering crack growth.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Soft Matter Año: 2022 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Reino Unido
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Soft Matter Año: 2022 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Reino Unido