Synthesis and phase behavior of a new 2-vinylbiphenyl-based   mesogen-jacketed liquid crystalline polymer with a high glass transition   temperature and low threshold molecular weight

doi:10.1039/c3py01755a

CORC > 北京大学 > 化学与分子工程学院

	Synthesis and phase behavior of a new 2-vinylbiphenyl-based mesogen-jacketed liquid crystalline polymer with a high glass transition temperature and low threshold molecular weight
	Zhang, Qi-Kai ; Tian, Hai-Jian ; Li, Chang-Feng ; Zhu, Yu-Feng ; Liang, Yongri ; Shen, Zhihao ; Fan, Xing-He
刊名	polymer chemistry
	2014
关键词	TRANSFER RADICAL POLYMERIZATION SIDE-CHAIN POLYMERS CONJUGATED POLYMERS CORE DESIGN 1,3,4-OXADIAZOLE SPACER
DOI	10.1039/c3py01755a
英文摘要	We have synthesized a new mesogen-jacketed liquid crystalline polymer, poly(4'-(methoxy)-2-vinylbiphenyl-4-methyl ether) (PMVBP) containing a biphenyl core in the side-chain. PMVBP has a smaller monomer molecular weight (MW), a higher glass transition temperature and a lower threshold MW for liquid crystalline (LC) formation. PMVBP was obtained via a nitroxide-mediated living radical polymerization and characterized by gel permeation chromatography, differential scanning calorimetry, polarized light microscopy, and one- and two-dimensional wide-angle X-ray diffraction (WAXD) experiments. The number-average MW (M-n) of the polymers ranges from 0.41 x 10(4) to 1.64 x 10(4) g mol(-1). A relatively high glass transition temperature is observed, which increases from 173 to 208 degrees C with increasing MW. The LC phase developed at relatively high temperatures is strongly dependent on the Mn of the polymer. A hexagonal columnar (Phi(H)) LC phase is observed above 260 degrees C when the Mn is only above 0.53 x 10(4) g mol(-1), a low threshold MW for LC formation. All of the LC phases are retained during cooling.; Polymer Science; SCI(E); EI; 2; ARTICLE; zshen@pku.edu.cn; fanxh@pku.edu.cn; 15; 4526-4533; 5
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150662]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Zhang, Qi-Kai,Tian, Hai-Jian,Li, Chang-Feng,et al. Synthesis and phase behavior of a new 2-vinylbiphenyl-based mesogen-jacketed liquid crystalline polymer with a high glass transition temperature and low threshold molecular weight[J]. polymer chemistry,2014.
APA	Zhang, Qi-Kai.,Tian, Hai-Jian.,Li, Chang-Feng.,Zhu, Yu-Feng.,Liang, Yongri.,...&Fan, Xing-He.(2014).Synthesis and phase behavior of a new 2-vinylbiphenyl-based mesogen-jacketed liquid crystalline polymer with a high glass transition temperature and low threshold molecular weight.polymer chemistry.
MLA	Zhang, Qi-Kai,et al."Synthesis and phase behavior of a new 2-vinylbiphenyl-based mesogen-jacketed liquid crystalline polymer with a high glass transition temperature and low threshold molecular weight".polymer chemistry (2014).