Analysis of rubbed polyimide films by polarized infrared spectroscopy: Effects of immersion in organic solvents

被引：18

作者：

Hasegawa, R ^{[1
]}

Mori, Y ^{[1
]}

Sasaki, H ^{[1
]}

Ishibashi, M ^{[1
]}

机构：

[1] TOSHIBA CO LTD,ENVIRONM TECHNOL LAB,SAIWAI KU,KAWASAKI,KANAGAWA 210,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1996年 / 35卷 / 6A期

关键词：

liquid crystal; polyimide; pretilt angle; infrared dichroism; rubbing; organic solvents; immersion; molecular orientation;

D O I：

10.1143/JJAP.35.3492

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We applied polarized infrared (IR) spectroscopy to the analysis of rubbed polyimide (PI) films and evaluated the PI orientation induced by rubbing by measuring the dichroic difference. The IR dichroic difference and liquid crystal (LC) alignment were analyzed for rubbed PI films that were immersed in various organic solvents. The solvents which reduced the dichroic difference and pretilt angle of LC molecules could be characterized in terms of their solubility parameters. When the dichroic difference of the PI films was greatly reduced by the immersion in the solvents, a correlation between the LC pretilt angle and the dichroic difference (i.e. the in-plane orientation of the PI molecules) was observed.

引用

页码：3492 / 3495

页数：4

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