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首页> 外文会议>Conference on Liquid Crystals; 20031013-20031017; Zakopane; PL >Surface free energy of chosen polyimides used for alignment of liquid crystals
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Surface free energy of chosen polyimides used for alignment of liquid crystals

机译：所选用于液晶取向的聚酰亚胺的表面自由能

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摘要

According to classical method polyimides were obtained in two-step polycondensation process via 10% solutions of poly(amic acid)s in dimethylformamide (DMF). The indium tin oxide (ITO)-glass plates or glass plates were spin-coated with the 1% (w/w) poly(amic acid)s solutions and then the solvent was evaporated. The aligning polyimide layers were prepared by thermal imidization. Polyimide layers on indium tin oxide (ITO)-glass plates were prepared by thermal imidization at 250℃ for 4 h. Their surface free energy and its components were determined. Polyimide films on soda glass with various degree of imidization were prepared by thermal treatment at 180℃, 200℃, 220℃ and 250℃. Evaluation of rubbed polyimide layers wettability by four nematic liquid crystals (5CB, 6CB, 6CHBT and 8CHBT) was carried out.
机译：根据经典方法，通过两步缩聚过程，通过聚（酰胺酸）在二甲基甲酰胺（DMF）中的10％溶液获得聚酰亚胺。用1％（w / w）聚（酰胺酸）溶液旋涂氧化铟锡（ITO）玻璃板或玻璃板，然后蒸发溶剂。通过热酰亚胺化制备取向聚酰亚胺层。通过在250℃下热酰亚胺化4 h，在氧化铟锡（ITO）-玻璃板上制备聚酰亚胺层。确定了它们的表面自由能及其成分。通过在180℃，200℃，220℃和250℃下热处理，在亚胺化程度的钠玻璃上制备聚酰亚胺薄膜。评估了四种向列型液晶（5CB，6CB，6CHBT和8CHBT）对摩擦的聚酰亚胺层的润湿性。

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