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Various fillers and thermoplastics are often added to thermoset epoxies to improve toughness, but this may compromise their other properties or make synthesis difficult. In this study, brittle crosslinked epoxy networks are significantly toughened through in-situ polymerization of epoxy using piperazine, which reacts at moderately low temperatures in a catalyst-free one-pot method. Dynamic mechanical properties and nanoscale morphology suggest the mechanism for improved toughness is higher yielding near the crack tip due to increased molecular weight between crosslinks. The resulting toughness is higher than any other unfilled all-epoxy materials found in the literature.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: Thermoset epoxy, Thermoplastic epoxy, Fracture toughness, Piperazine

刊行年月日: 2023-01-03

出版者: Elsevier BV

掲載誌:

• MATERIALS LETTERS (ISSN: 0167577X) vol. 335 p. 133821-133821

研究助成金:

• JSPS Grant-in-Aid for Young Scientists (KAKENHI) (Understanding the Relationship between Polymer Structure and Creep Deformation/Failure by Multiscale Analysis)

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4281

公開URL: https://doi.org/10.1016/j.matlet.2023.133821

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更新時刻: 2025-01-04 12:30:33 +0900

MDRでの公開時刻: 2025-01-04 12:30:33 +0900