Thermal and liquid crystalline properties of ionic liquid crystalline systems

被引：1

作者：

Ujiie, S ^{[1
]}

Tanaka, Y

Yano, Y

Mori, A

Iimura, K

机构：

[1] Oita Univ, Fac Engn, Dept Appl Chem, Oita 8701192, Japan

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

[3] Kyushu Univ, Inst Mat Chem & Engn, Kasuga, Fukuoka 8168580, Japan

来源：

KOBUNSHI RONBUNSHU | 2006年 / 63卷 / 01期

关键词：

ionic liquid crystal; polyion; counterion; smectic; columnar; homeotropic; polymerization; X-ray;

D O I：

10.1295/koron.63.11

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The thermal and liquid crystalline properties of ionic liquid crystalline systems were described. Ionic liquid crystals obtained by proton-transfer reaction of alkanoic acid and polymer having amino groups exhibited smectic A and columnar mesophases. The liquid crystal formation of pyridinium liquid crystals strongly depended on counterions. Ionic liquid crystals (ILCI) having mesogenic and ammonium units showed a smectic A phase. ILCI having N-methylpiperidinium unit and iodide counterion exhibited a glass transition and formed a glassy smectic orientation. Binary systems composed of an ionic liquid crystal with an ethyleneiminium unit and polyvinylalcohol formed a hydrophilic sublayer containing polyvinylalcohol in the smectic A phase. The polyvinylalcohol enhanced the thermal stability of the smectic A phase. The oriented polymer films were obtained by the bulk polymerization of ionic liquid monomers. All the ionic liquid crystals exhibited the spontaneous formation of a homeotropic alignment by physical adsorption of the ionic groups.

引用

页码：11 / 18

页数：8

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