THE PRETILT ANGLE CONTROLLABLE POLYIMIDE LANGMUIR-BLODGETT-FILM FOR NEMATIC LIQUID-CRYSTALS

被引:13
作者
NAKAJIMA, Y [1 ]
SAITO, K [1 ]
MURATA, M [1 ]
UEKITA, M [1 ]
机构
[1] KANEKA CORP,CENT RES LABS,HYOGO KU,KOBE 652,JAPAN
来源
MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1993年 / 237卷
关键词
LANGMUIR-BLODGETT FILMS; POLYIMIDE; ALKYL GROUPS; NEMATIC LIQUID CRYSTALS; ALIGNMENT FILM; PRETILT ANGLE; CRITICAL SURFACE TENSION; DEGREE OF IMIDIZATION;
D O I
10.1080/10587259308030128
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
A new non-rubbing alignment film for nematic liquid crystals has been developed employing the polyimide precursor Langmuir-Blodgett film having long chain alkyl groups. This film has the ability to tilt the liquid crystal molecules. We discovered that the pretilt angle of nematic liquid crystals can be controlled by changing the thermal treatment temperature of the polyimide precursor Langmuir-Blodgett films. We studied the causing mechanism of the pretilt angle by investigating the thermal treatment temperature dependence of degree of imidization, the number of the long chain alkyl groups, the critical surface tension, and the tilt angle of long chain alkyl groups of the Langmuir-Blodgett films.
引用
收藏
页码:111 / 119
页数:9
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