无柔性间隔基侧链液晶高分子的设计合成及其性质研究

本课题拟设计合成一系列含刚性棒状液晶基元的无柔性间隔基尾接型侧链液晶高分子或含盘状液晶基元的无柔性间隔基侧链液晶高分子，对其液晶相结构、相转变行为和性质进行研究。通过对主链、液晶基元和末端基的合理组合实现对无柔性间隔基侧链液晶高分子液晶相结构和相行为及主链刚柔性的调控。合理利用侧链液晶高分子主链和液晶基元之间的"偶合"作用，获得液晶相稳定性和主链刚性的双赢，统筹液晶基元对外场（光、电、磁）及主链对外力的敏感性，进而借助外场或外力作用，实现侧链液晶高分子液晶基元的长程有序排列，为制备功能性液晶高分子材料提供理论基础。

A series of side-chain liquid crystalline polymers (SCLCPs) with rod-like or disc-like mesogens directly attached to backbone without spacers will be designed and synthesized. The phase structures, phase transitions and properties of the polymers will be investigated. Through changing the chemical structures of backbones, mesogenic units and terminal groups, the phase behavior and the chain conformation of the SCLCPs without spacers can be tailored. On the basic of the coupling between the side-chains and polymer backbone, the SCLCPs without spacers can self-organize into the stable liquid crystalline phases. Meanwhile, the polymer backbone will be extended. Taking advantage of the properties of mesogens under external field (optical, electrical and magnetic) and the main chain under the external force, the SCLCPs without spacers should form long-range ordered state under external stimuli, which will be useful to prepare for the function liquid crystalline polymers materials.