含液晶基元的光控取向薄膜新型材料的制备及初步表征  

Synthesis and Characterization of a Novel Photoalignment Liquid Crystalline Polymer

作　　者：朱军[1] 金曦[1] 石可瑜[1] 吴利平[1] 郭先芝[1] 何尚锦[1] 杜宗杰[1] 张保龙[1] 

机构地区：[1]南开大学化学系,天津300071

出　　处：《南开大学学报（自然科学版）》2006年第2期81-84,共4页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金光电信息功能材料重大研究计划(90201024);国家自然科学基金(50103004)

摘　　要：合成了一种侧链上同时含有液晶基元、柔性间隔基和肉桂酰感光基团的新型液晶聚合物,用核磁共振(1H NM R)和傅里叶红外光谱(FT IR)确定了上述中间体的结构,并用热分析等手段研究了聚合物性能.经线性偏振紫外光聚合技术处理聚合物膜,通过检测照射前后聚合物薄膜透光率的变化可知,所制备的取向薄膜具有良好的定向能力,该聚合物是一类具有潜在应用价值的新型光控取向薄膜材料.A kind of novel liquid crystalline containing biphenyt, flexible spacer and cinnamoyl group was synthesized. The monomer was initiated to polymerize by AIBN and led to photoreactive polymer, which was highly sensitive to the LPL photochemically. The thermal properties and the mesophase structure of the polymer were investigated by differential scanning calorimetry （DSC）. The polymer was spin-coated on a SiO2 glass substrate from DMF solution, resulting in a thin film. Irradiation of a LP-UV light resulted in anisotropic [2＋2] cycloadditions of the cinnamon acyl groups, which caused the alignment of biphenyl groups in side chains at the same time. The differences of absorbance at different irradiation time were obtained which can be used to explain that the polymer can be applied in photoalignment layer.

关 键 词：液晶取向 偏振紫外光 薄膜 

分 类 号：O635[理学—高分子化学]