2022 Fiscal Year Annual Research Report
Understanding the Relationship between Polymer Structure and Creep Deformation/Failure by Multiscale Analysis
| Project/Area Number |
20K14617
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
タンクス ジョナサンデビッド 国立研究開発法人物質・材料研究機構, 構造材料研究拠点, 研究員 (50850947)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 高分子ナノ複合材料 / 動的力学特性 / 破壊靱性 |
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| Outline of Annual Research Achievements |
The original purpose of this project was to study creep deformation and rupture, but the remaining time in FY2022 was insufficient to properly execute the necessary experiments and analysis; thus, dynamic mechanical behavior was studied at a shorter time scale instead.
A secondary amine was used to modify crosslinked epoxy networks and thereby greatly improved fracture toughness (over 150%) while maintaining flexural strength and stiffness. This was achieved by in-situ extension of epoxy chains between crosslinks without inducing meso-scale phase separation, as determined by DMA and AFM. Additionally, chain dynamics informed the design of new epoxy-based materials with excellent toughness and stiffness (patent application in progress).
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