Ionic liquid crystalline systems with branched or hyperbranched polymers

被引：7

作者：

Ujiie, S ^{[1
]}

Osaka, M

Yano, Y

Iimura, K

机构：

[1] Shimane Univ, Interdisciplinary Fac Sci & Engn, Dept Mat Sci, Matsue, Shimane 6908504, Japan

[2] Sci Univ Tokyo, Fac Sci, Dept Chem, Shinjuku Ku, Tokyo 1628601, Japan

来源：

KOBUNSHI RONBUNSHU | 2000年 / 57卷 / 12期

关键词：

ionic liquid crystalline system; ion complex; branched polymer; dendrimer; phase transitions; orientational behavior;

D O I：

10.1295/koron.57.797

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Thermal, liquid crystalline, and orientational properties of ion complex-type liquid crystalline systems with branched or hyperbranched polymers were estimated. In this research, branched polyethyleneimine (BPEI), polyallylamine (PAA), poly (amido amine) dendrimer (DD), alkanoic acid (Cn) and an azobenzene derivative (5 Az 8) with a terminal carboxyl group were used. Polyion complexes were prepared by the proton-transfer reaction of polyamines and carboxylic acids. The liquid crystalline systems formed fluid smectic mesophases. The ionic interactions lead to the formation of liquid crystalline phases and the enhancement of thermal stability. The introduction of branched chains decreased isotropization temperature and isotropization enthalpy of the liquid crystalline systems.

引用

页码：797 / 802

页数：6

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