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

页码：151 / 158

页数：8

共 13 条

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