TWISTED SMECTIC-A PHASES IN SIDE-CHAIN LIQUID-CRYSTAL POLYMERS

被引：12

作者：

BOLTON, EC ^{[1
]}

LACEY, D ^{[1
]}

SMITH, PJ ^{[1
]}

GOODBY, JW ^{[1
]}

机构：

[1] UNIV HULL, SCH CHEM, Kingston Upon Hull HU6 7RX, N HUMBERSIDE, ENGLAND

来源：

LIQUID CRYSTALS | 1992年 / 12卷 / 02期

关键词：

D O I：

10.1080/02678299208030399

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The syntheses of two side chain liquid crystal polymers, a polyacrylate and a polymethacrylate, are reported. In each of the polymers the liquid-crystalline side group carries an asymmetric carbon atom, thereby making some of the liquid crystal phases formed by the polymers optically active and chiral. For the chiral polyacrylate smectic A and chiral ferroelectric smectic C phases are observed, however for the chiral polymethacrylate a cholesteric phase is detected above the smectic A phase. It is found that the smectic A to cholesteric phase transition is mediated by the formation of an intermediary twisted smectic A phase. This intermediary phase is a liquid-crystalline analogue of the Abrikosov flux phase found in Type II superconductors.

引用

页码：305 / 318

页数：14

共 13 条

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