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このアイテムの引用には次の識別子を使用してください:
http://hdl.handle.net/10119/11476
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| タイトル: | Syntheses of hyperbranched liquid-crystalline biopolymers with strong adhesion from phenolic phytomonomers |
| 著者: | Wang, Siqian
Kaneko, Daisaku
Kan, Kai
Jin, Xin
Kaneko, Tatsuo |
| キーワード: | adhesives
hyperbranched polymers
liquid-crystalline biopolymers
phenolic phytomonomers |
| 発行日: | 2012-11-06 |
| 出版者: | International Union of Pure and Applied Chemistry |
| 誌名: | Pure and Applied Chemistry |
| 巻: | 84 |
| 号: | 12 |
| 開始ページ: | 2559 |
| 終了ページ: | 2568 |
| DOI: | 10.1351/PAC-CON-12-05-12 |
| 抄録: | A novel thermotropic liquid-crystalline (LC) biocopolymer, poly{trans-3-methoxyl-4-hydroxycinnamic acid (MHCA: ferulic acid)-co-trans-3,4-dihydroxycinnamic acid (DHCA: caffeic acid)}, was synthesized by a thermal acidolysis-polycondensation of MHCA and DHCA, efficiently catalyzed by Na_2HPO_4. When the MHCA composition of poly(MHCA-co-DHCA) was 60, 75, and 90 mol %, the copolymers showed a nematic LC phase although individual homopolymers such as polyMHCA and polyDHCA did not exhibit LC phase. Poly(MHCA-co-DHCA)s showed high molecular weight (M_w) ranged between M_n 2.6 × 10^4 to 3.7 × 10^4 and M_w 8.2 × 10^4 to 13.1 × 10^4, respectively, high glass-transition temperature (T_g) with the range of 115 to 140 °C and high degradation temperature T_<10>, from 315 to 356 °C. In the adhesive test of copolymers against the surface of carbon substrate, the copolymers showed high shear strength at fracture. |
| Rights: | Copyright (C) 2012 International Union of Pure and Applied Chemistry. Siqian Wang, Daisaku Kaneko, Kai Kan, Xin Jin, and Tatsuo Kaneko, Pure and Applied Chemistry, 84(12), 2012, 2559-2568. http://dx.doi.org/10.1351/PAC-CON-12-05-12 |
| URI: | http://hdl.handle.net/10119/11476 |
| 資料タイプ: | publisher |
| 出現コレクション: | c10-1. 雑誌掲載論文 (Journal Articles)
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