Design, synthesis, and characterization of a combined   main-chain/side-chain liquid-crystalline polymer based on ethyl   cellulose

doi:10.1007/s10570-009-9392-z

CORC > 北京大学 > 化学与分子工程学院

	Design, synthesis, and characterization of a combined main-chain/side-chain liquid-crystalline polymer based on ethyl cellulose
	Hu, Tianhui ; Xie, Helou ; Xiao, Jianbo ; Zhang, Hailiang ; Chen, Erqiang
刊名	cellulose
	2010
关键词	DCC coupling Liquid-crystalline cellulose derivatives Main-chain/side-chain liquid-crystalline polymer Phase behavior Supramolecular structures LATERAL MESOGENIC GROUPS POLYMETHYLENE SPACERS SIDE-CHAINS HYDROXYPROPYL CELLULOSE HYDROXYETHYL CELLULOSE THERMOTROPIC BEHAVIOR PHASE-BEHAVIOR RIGID-ROD ESTERS ACID
DOI	10.1007/s10570-009-9392-z
英文摘要	A novel combined main-chain/side-chain liquid-crystalline polymer based on an ethyl cellulose main chain containing azobenzene mesogens (AzoEC) was successfully synthesized. Molecular characterization of the resulting polymers with different degrees of substitution (DS) was performed with proton nuclear magnetic resonance ((1)H NMR), Fourier-transform infrared spectroscopy (FTIR), and gel permeation chromatography (GPC). Thermal stability was investigated by thermogravimetric analysis (TGA). The phase transitions and liquid-crystalline behavior of these polymers were investigated by differential-scanning calorimetry (DSC), polarized optical microscopy (POM), and wide-angle X-ray diffraction (WAXD). The results indicate that DS has substantial effect on the liquid-crystalline behavior of these polymers. AzoEC with low DS only shows the cholesteric phase similar to ethyl cellulose (EC). However, when DS increases to a specific value, AzoEC begins to show fascinating supramolecular structures. The supramolecular structure of AzoEC with maximum DS consisted of a large-scale ordered lamellar structure formed by EC main chains and a small-scale ordered structure formed by azobenzene mesogens.; Materials Science, Paper & Wood; Materials Science, Textiles; Polymer Science; SCI(E); 7; ARTICLE; 3; 547-558; 17
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/243836]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Hu, Tianhui,Xie, Helou,Xiao, Jianbo,et al. Design, synthesis, and characterization of a combined main-chain/side-chain liquid-crystalline polymer based on ethyl cellulose[J]. cellulose,2010.
APA	Hu, Tianhui,Xie, Helou,Xiao, Jianbo,Zhang, Hailiang,&Chen, Erqiang.(2010).Design, synthesis, and characterization of a combined main-chain/side-chain liquid-crystalline polymer based on ethyl cellulose.cellulose.
MLA	Hu, Tianhui,et al."Design, synthesis, and characterization of a combined main-chain/side-chain liquid-crystalline polymer based on ethyl cellulose".cellulose (2010).