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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/11476

Title: Syntheses of hyperbranched liquid-crystalline biopolymers with strong adhesion from phenolic phytomonomers
Authors: Wang, Siqian
Kaneko, Daisaku
Kan, Kai
Jin, Xin
Kaneko, Tatsuo
Keywords: adhesives
hyperbranched polymers
liquid-crystalline biopolymers
phenolic phytomonomers
Issue Date: 2012-11-06
Publisher: International Union of Pure and Applied Chemistry
Magazine name: Pure and Applied Chemistry
Volume: 84
Number: 12
Start page: 2559
End page: 2568
DOI: 10.1351/PAC-CON-12-05-12
Abstract: 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
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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