Synthesis and Properties of Hybrid Hyperbranched Polymers Containing Oxetane Moiety in the Main Chain and Terminal Oxetanyl, Methacryloyl and Carboxyl Groups

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  • NOSAKA Mami
    Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University
  • KUDO Hiroto
    Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University
  • NISHIKUBO Tadatomi
    Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University

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  • 主鎖および末端にオキセタニル基, 末端にメタクリロイル基およびカルボキシル基を有するハイブリッド型ハイパーブランチポリマーのワンポット合成とその性質
  • シュサ オヨビ マッタン ニ オキセタニルキ マッタン ニ メタクリロイルキ オヨビ カルボキシルキ オ ユウスル ハイブリッドガタ ハイパーブランチ ポリマー ノ ワンポット ゴウセイ ト ソノ セイシツ

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The polyaddition reaction of 1, 3, 5-trisglycidyloxybenzene (TGOB) with 3, 3-bis (4-carboxylphenyloxymethyl) oxetane (CPOMO), methacrylic acid (MAA), and 3-carboxyl-3-ethyloxetane (CEO) was carried out in the presence of tetrabutylammonium bromide (TBAB) as a catalyst at 90°C for 18 h to give the hybrid hyperbranched polymer (HBP-OX-MA-CA) (Mn's = 5200, Mw/Mn=2.21) with terminal oxetanyl, methacryloyl, and carboxyl groups in 80 % yield. Certain curing reactions of HBP-OX-MA-CA were performed in the film state using appropriate photo-acid generator, photo-radical initiator, or tetraphenylphosphonium iodide (TPPI) as a catalyst to give the corresponding cured films. The thermal properties of resulting cured films were examined, and it was found that hybrid cured film by photo-initiated radical polymerization + photo-initiated cationic polymerization + thermal reaction of oxetane groups with carboxyl groups showed higher Tg than the other cured films by each reaction such as photo-initiated radical polymerization, photo-initiated cationic polymerization, and thermal reaction of oxetane groups with carboxyl groups.

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