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Showing 1–5 of 5 results
Advanced filters: Author: Hironori Taguchi Clear advanced filters

  • This study quantifies the relative contributions of material crystallinity and environmental factors to the marine degradation rate of poly(ε-caprolactone) (PCL). PCL sheets with controlled crystallinity were exposed at six Japanese coastal locations for 6–15 months. Machine learning regression (CatBoost, R² = 0.60) combined with SHAP analysis revealed that water temperature contributed most strongly to degradation rate variation, followed by depth and total nitrogen, while crystallinity showed moderate influence. These findings demonstrate that environmental conditions substantially drive degradation rate variability in realistic marine settings, providing insights for field-relevant material design and environmental compatibility assessment.

    • Hironori Taguchi
    • Takako Kikuchi
    • Keiji Tanaka
    Research
    Polymer Journal
    P: 1-12

  • Under hygrothermal conditions, the glass transition temperature of an amine-cured epoxy resin decreased over time. This decrease originated from a progressive reduction in the cross-linking density rather than from the plasticization effect of sorbed water. Degradation reactions involving scission of ether bonds occurred, producing bisphenol A and its derivatives. This bond scission was initiated by radical-mediated thermal decomposition, followed by hydrogen donation from sorbed water.

    • Ko Yamaguchi
    • Atsuomi Shundo
    • Keiji Tanaka
    Research
    Polymer Journal
    P: 1-9

  • Understanding and controlling the skyrmion lattice (SkL) phase facilitates its versatile applications. Here the direct observation of a SkL phase with large topological Hall effect in centrosymmetric Gd3Ru4Al12 is reported, which is stabilized by thermal fluctuations and magnetic field without Dzyaloshinskii-Moriya interactions.

    • Max Hirschberger
    • Taro Nakajima
    • Yoshinori Tokura
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-9