Advanced search

Filter By:

Journal Check one or more journals to show results from those journals only.

Choose more journals

Article type Check one or more article types to show results from those article types only.
Subject Check one or more subjects to show results from those subjects only.
Date Choose a date option to show results from those dates only.

Custom date range

Clear all filters
Sort by:
Showing 1–5 of 5 results
Advanced filters: Author: Yoko Tatewaki Clear advanced filters

  • 10,10′-(1,4-Phenylene)bis(5,7,9-decatriynyl N-(butoxycarbonylmethyl)carbamate) 1 and its perfluorophenylene derivative 2 were synthesized. Upon UV irradiation, both of them showed excitonic absorption of polydiacetylene. In particular, 2 showed an absorption maximum at 743 nm, which was approximately 100 nm longer than that of conventional polydiacetylenes, and its solid-state polymerization scheme was investigated.

    • Keita Sasamura
    • Kei Mizuguchi
    • Shuji Okada
    Research
    Polymer Journal
    Volume: 50, P: 1159-1167

  • The 1:1 mixtures of zinc diacrylate (ZDA) and zinc dialkanoate (ZDCx) was found to start melting at lower temperature than the melting points of the original components and polymerization of acrylate portions progressed in the molten state at lower temperature than the polymerization temperature of ZDA, In this process, ion exchange between ZDA and ZDCx was confirmed to accelerate the reaction.

    • Satoshi Nakashima
    • Yoko Tatewaki
    • Mikio Yamada
    Research
    Polymer Journal
    Volume: 48, P: 855-858

  • Zinc diacrylate (ZDA) gave the polymer as shown in the scheme by heating in the solid state. When additives like diphenyl disulfide (DPDS), thiophenol (TP) and dicumyl peroxide (DCP) were mixed in 1/60 molar ratio to ZDA, qualitative order of the polymerization rate was obtained to be ZDA < ZDA-DPDS(or TP) << ZDA-DPDS(or TP)-DCP < ZDA-DCP. Namely, mixing these additives to ZDA accelerated the solid-state polymerization.

    • Junki Tsuchida
    • Yosuke Saito
    • Mikio Yamada
    Research
    Polymer Journal
    Volume: 45, P: 1007-1012

  • 10,12,14,16,18,20-Triacontahexayne-1,30-diol and its diphenylurethane and diphenylester were synthesized, and their solid-state polymerization behaviors were investigated. The regular two-step solid-state polymerization was confirmed for the diphenylurethane derivative.

    • Satoshi Inayama
    • Yoko Tatewaki
    • Shuji Okada
    Research
    Polymer Journal
    Volume: 42, P: 201-207