Aromatic side-chain liquid-crystalline polyurethanes with azobenzene mesogenic units

被引：3
|
作者：
Brecl, M [1 ]
Ambrozic, G [1 ]
Zigon, M [1 ]
机构：
[1] Natl Inst Chem, Lab Polymer Chem & Technol, SI-1000 Ljubljana, Slovenia
来源：
POLYMER BULLETIN | 2002年 / 48卷 / 02期
关键词：
D O I：
10.1007/s00289-002-0027-x
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
We have synthesized SC-LCPUs from 1,1'-methylenebis(4-isocyanatobenzene) (MDI) and azobenzene mesogenic diols (alpha-[bis(2-hydroxyethyl)amino]-omega-(4-R-azobenzene-4'-oxy)alkanes, R = -OCH3, -CN and -NO2) with 4, 8 or 12 methylene spacer units. All the C4RMDIP are amorphous polymers showing no mesomorphic properties, whereas for C8RMDIP polyurethanes only C8OMeMDIP is liquid-crystalline. The smectic structures of C12RMDIP polymers are defined by the terminal group; the layer spacing values give the order CN>NO2>OMe.
引用
收藏
页码：151 / 158
页数：8
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