含X-型二维液晶基元和反式-4,4′-双(4-羟基苯基偶氮)二苯并-18-冠-6冠醚环的液晶共聚酯的合成与表征

doi:10.3321/j.issn:1000-3304.2006.03.006

CORC > 北京大学 > 化学与分子工程学院

	含X-型二维液晶基元和反式-4,4′-双(4-羟基苯基偶氮)二苯并-18-冠-6冠醚环的液晶共聚酯的合成与表征; Synthesis and characterization of liquid crystalline copolyesters with X-shaped two-dimensional mesogenic units and crownether cycles of trans-4, 4 '-bis (4-hydroxy-phenylazo) dibenzo-18-crown-6
	张淑媛 ; 刘玉坤 ; 徐晓辉 ; 郑世军 ; 王经武 ; 王萌 ; 史鸿威 ; 李自法 ; 周其凤
刊名	高分子学报
	2006
关键词	X-型二维液晶基元反式-4 4′-双(4-羟基苯基偶氮)二苯并-18-冠-6 液晶共聚酯合成与表征 x-shaped two-dimensional unit trans-4, 4 &apos liquid crystalline copolyester synthesis and characterization -Bis (4-hydroxyphenylazo) dibenzo-18-crown-6
DOI	10.3321/j.issn:1000-3304.2006.03.006
英文摘要	以4,4-′(α,ω己二酰氧)二苯甲酰氯(M1)、2,5-二(对辛氧基苯甲酰氧基)氢醌(M2)和反式4,4′-双(4羟基苯基偶氮)二苯并18冠6(M3)为单体,通过溶液共缩聚反应,合成了一系列含X型二维液晶基元和反式4,4′双(4羟基苯基偶氮)二苯并18冠6冠醚环的主链型液晶共聚酯.共聚酯的分子量不高,[η]在0.37～0.25dL g之间.单体的化学结构通过IR、UV、H NMR、MS和元素分析等方法确证.共聚酯的外观为黄色粉状固体,除CP9外,室温下不溶于CHCl3和THF溶剂.共聚酯的性质采用GPC、[η]、DSC、TG、WAXD和POM等方法进行了研究.发现所有的共聚酯加热到各自的熔融...; A series of main chain liquid crystalline copolyesters with X-shaped two-dimensional mesogenic units and crown ether cycles of trans-4, 4'-bis (4-hydroxyphenylazo) dibenzo-18-crown-6 was synthesized via solution cocondensation polymerizations from 4, 4'-(alpha, omega-hexanedioylxy) dibenzoyl dichloride (M-1), 2, 5-bis (p-octyloxybenzoyloxy) hydroquinone (M-2) and trans-4,4'-bis (4-hydroxyphenylazo) dibenzo-18-crown-6 (M-3) as the monomers. The molecular weights of copolyesters are not high, and the [eta] of the copolyesters ranges from 0.37 similar to 0.25 dL/g. The monomer structures were identified by using elementary analysis, IR, UV, H-1-NMR and MS etc. All the copolyester samples are yellowish powders and insoluble at room temperature in THF and CHCl3 except sample CP9. The properties of copolyesters were investigated by using GPC, [eta], DSC, TG, WAXD and POM. It was found that all the copolyesters went into liquid-crystal phase when they were heated over their melting temperature (T-m). In their liquid crystalline state, the typical mosaic texture or focal-conics texture or broken fan texture of smectic phase, and ball granul texture or thread texture or schlieren texture of nematic phase can be observed. Their melting temperature and isotropization temperature (T-i) changed regularly with varying the trans-4, 4'-bis (4-hydroxyphenylazo) dibenzo-18-crown-6 unit content in the copolyesters. The WAXD studies also evidenced the liquid crystallinity of these copolyesters.; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 4; 03; 402-407
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/213133]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	张淑媛,刘玉坤,徐晓辉,等. 含X-型二维液晶基元和反式-4,4′-双(4-羟基苯基偶氮)二苯并-18-冠-6冠醚环的液晶共聚酯的合成与表征, Synthesis and characterization of liquid crystalline copolyesters with X-shaped two-dimensional mesogenic units and crownether cycles of trans-4, 4 '-bis (4-hydroxy-phenylazo) dibenzo-18-crown-6[J]. 高分子学报,2006.
APA	张淑媛.,刘玉坤.,徐晓辉.,郑世军.,王经武.,...&周其凤.(2006).含X-型二维液晶基元和反式-4,4′-双(4-羟基苯基偶氮)二苯并-18-冠-6冠醚环的液晶共聚酯的合成与表征.高分子学报.
MLA	张淑媛,et al."含X-型二维液晶基元和反式-4,4′-双(4-羟基苯基偶氮)二苯并-18-冠-6冠醚环的液晶共聚酯的合成与表征".高分子学报 (2006).