Synthesis, characterization and biodegradation of biodegradable-cum-photoactive liquid-crystalline copolyesters derived from ferulic acid

被引：43
作者：
Du, Jie
Fang, Yuanyuan
Zheng, Yubin
机构：
[1] Dalian Univ Technol, Dept Polymer Sci & Mat, Dalian 116012, Peoples R China
[2] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Peoples R China
来源：
POLYMER | 2007年 / 48卷 / 19期
关键词：
biopolymers; liquid-crystalline polymers (LCP); photochemistry;
D O I：
10.1016/j.polymer.2007.07.040
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Novel biodegradable-cum-photoactive liquid-crystalline copolyester was prepared by melt polycondensation of ferulic acid (FA), 4-hydroxybenzoic acid (HBA) and D,L-lactic acid (LA) in the presence of acetic anhydride and a transesterification catalyst. The chemical structures and properties of the synthesized copolyesters were characterized by means of viscosity measurements, Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance spectroscopy (H-1 NMR), differential scanning calorimetry (DSC), thermogravimetry (TGA), polarizing light microscopy (PLM) and ultraviolet spectroscopy (UV). It was found that modestly increasing LA content and adjusting feed ratios could enhance the solubility and biodegradability of the copolyesters, still retaining the liquid crystallinity. The obtained copolyester could degrade in phosphate buffer solution (pH 7.2) with enzyme proteinase K, and could crosslink by UV-irradiation at ambient temperature. (C) 2007 Elsevier Ltd. All rights reserved.
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页码：5541 / 5547
页数：7
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