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Showing 1–2 of 2 results
Advanced filters: Author: "Toshio Masuda" Clear advanced filters

  • This article reviews the development of catalysts for ring-opening metathesis polymerization (ROMP), synthesis of polymers bearing amino acids and peptides by ROMP of functionalized norbornenes, formation of aggregates and micelles, and applications of the polymers to medical materials. It also describes the control of monomer unit sequences, that is, living polymerization to synthesize block copolymers, and alternating copolymerization that is achieved on the basis of acid–base interactions.

    • Sutthira Sutthasupa
    • Masashi Shiotsuki
    • Fumio Sanda
    Reviews
    Polymer Journal
    Volume: 42, P: 905-915

  • Partially crosslinked poly(diphenylacetylene) (3a) bearing silanol groups were synthesized by the treatment of the membrane of 2a with n-Bu4N+F−. Imidazolium salt-containing poly(diphenylacetylene) (3b (Br−)) was obtained by the substitution of 1-methylimidazole to the membrane of 2b. Sulfonation of 2c gave a sulfonated poly(diphenylacetylene) (3c). The membrane of 3a was found to exhibit high gas permeability irrespective of the presence of the polar silanol groups in the polymer. Introduction of 1-methylimidazole into the membrane remarkably increased the CO2/N2 selectivity (PCO2/PN2=31–44). The sulfonated polymer 3c exhibited high CO2 permselectivity, and the PCO2/PN2 was as large as 54.

    • Toshikazu Sakaguchi
    • Tamotsu Hashimoto
    Reviews
    Polymer Journal
    Volume: 46, P: 391-398