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Showing 1–3 of 3 results
Advanced filters: Author: Shinji Kanehashi Clear advanced filters
  • Cashew nut shell liquid (CNSL) is a natural phenolic compounds that is non-edible biomass. A novel diglycidyl ether (BCNDGE) derived from CNSL was synthesized and used as a building block to formulate an epoxy resin. Epoxy resins were cured from BCNDGE and commercial diglycidyl ether (BPADGE) with acid anhydride hardener. BCNDGE content improved the thermal stability and flexibility of the epoxy compared with commercial BPADGE-based epoxy. Hence, BCNDGE is a promising novel diglycidyl ether candidate with high biomass content to act as an alternative to petroleum-based chemicals for epoxy resins.

    • Yuka Yokoyama
    • Tatsuya Yasui
    • Shinji Kanehashi
    Research
    Polymer Journal
    Volume: 55, P: 859-867
  • UV light irradiation causes the unexpected structural transition from core–shell to Janus in droplets consisting of a poly(4-butyltriphenylamine) (PBTPA)/poly(methyl methacrylate) (PMMA) blend solution. We obtained a phase-separated structure formed by the evaporation of the solvent from polymer solution droplets dispersed in an aqueous solution containing a surfactant. It was also found that the transition was caused by UV light with a wavelength of 365 nm, which is mainly absorbed by PBTPA, indicating that this phenomenon is triggered by PBTPA.

    • Shu Kikuchi
    • Shinji Kanehashi
    • Kenji Ogino
    Research
    Polymer Journal
    Volume: 50, P: 1089-1092
  • Three types of block copolymers consisting of polyfluorene and polytriarylamine with benzothiadiazole (BT) moiety are synthesized and characterized to evaluate the effect of chromophore location on electroluminescent performance. BT unit is incorporated at the junction of both blocks (BP 1) in the polytriarylamine block (BP 2) and in the polyfluorene block (BP 3). Electroluminescent device based on BP 1 exhibits the best performance. This result is reasonably explained by taking into consideration the difference of recombination probability in the phase-separated active layers.

    • Kyusun Kim
    • Yohei Inagaki
    • Kenji Ogino
    Research
    Polymer Journal
    Volume: 49, P: 721-728