Analysis of Rubbed Polyimide Films by Polarized Infrared Spectroscopy
作者:
Ray Hasegawa,
Yasushi Mori,
Hideyuki Sasaki,
Mitsuru Ishibashi,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 262,
issue 1
页码: 77-88
ISSN:1058-725X
年代: 1995
DOI:10.1080/10587259508033514
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Polarized infrared spectroscopy was applied to the analysis of rubbed polyimide films. N2purge of a sample chamber and increased substrate thickness enhanced the detection sensitivity. Dichroic differences were measured for the rubbed polyimide films at varied translating speed of the rubbing roller and at varied substrate temperature. The results suggest that the orientation of the polyimide was enhanced by increased polyimide surface temperature brought about by the heat of friction or the external heat. Moreover, a correlation between the LC alignment and the orientation of the polyimide chains was revealed by the analysis of the dichroic difference of the rubbed polyimide films immersed in organic solvents and the LC alignment on the films.
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