Molecular Orientation of Rubbed and Unrubbed Polyimide Films Determined by Polarized Infrared Absorption
Molecular Orientation of Rubbed and Unrubbed Polyimide Films Determined by Polarized Infrared Absorption
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通过偏振红外吸收测定摩擦和未摩擦聚酰亚胺薄膜的分子取向
DOI：
10.1143/jjap.33.l1323
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发表时间：
1994
影响因子：
1.5
通讯作者：
Shigeru Morokawa
中科院分区：
文献类型：
--
作者：
K. Sakamoto;R. Arafune;N. Ito;Sukekastu Ushioda;Yasushi Suzuki;Shigeru Morokawa
本文用偏振红外吸收光谱法测定了聚对苯二甲酰亚胺（PMDA ODA）分子在摩擦和未摩擦聚酰亚胺薄膜（120 nm）中的取向。我们发现，对于摩擦膜的聚合物链取向沿着摩擦方向，并从表面平面平均倾斜8.5°。我们的结论是摩擦引起的聚合物链的倾斜决定了大块液晶的指向矢的倾斜。
We have determined the orientations of poly[ 4,4′-oxydiphenylene-pyromellitimide] (PMDA-ODA) molecules in rubbed and unrubbed polyimide films ( ∼120 Å) on Si substrates by polarized IR absorption spectroscopy. We found that for rubbed films the polymer chains are oriented along the rubbing direction and are tilted up on average by 8.5° from the surface plane. We conclude that the polymer chain inclination induced by rubbing determines the tilt of the director of the bulk liquid crystal.