新型环氧树脂基液晶光定向层材料的合成与性能研究

经双酚A型环氧树脂与苯胺缩聚反应,制备含有羟基的先驱聚合物EP-AN,通过EP-AN上羟基与肉桂酰氯的酯化反应,制备了侧链带有肉桂酸酯基团的光敏聚合物EP-AN-CI.用核磁共振(1HNMR)、傅里叶红外光谱(FTIR)和热分析等手段确定了上述聚合物的结构与性能.用FTIR等方法表征了EP-AN-CI的光交联反应.经线性偏振光聚合技术(LPP)处理聚合物EP-AN-CI膜制备成液晶定向层,通过装配液晶盒和偏光显微镜观察表明,所制备的定向层具有很好的定向能力,该聚合物是一类具有潜在应用价值的新型液晶光定向层材料.

Synthesis and Characterization of a Novel Photo Alignment Layer for Liquid Crystal Based on Epoxy

The precursor EP-AN was synthesized by means of the polymerization between aniline and Biphenol-A epoxy which is industrial products. Then the cinnamate groups were attached to the chains of the hydroxyl-containing precursor to prepare EP-AN-CI, which is the potential photo alignment layer for liquid crystal. They were characterized by 1H-NMR, FTIR, and differential scanning calorimetry(DSC). EP-AN-CI was spin-coated on a ITO glass substrate from chloroform solution, resulting in a thin film, then though the linearly polarized polymerization(LPP) it was changed into photo alignment layer. LC cells of a 10 μm-thick were assembled via a capillary action. The photomocrographies were obtained which can be used to explain that EP-AN-CI can be applied in photo alignment layer.