本實驗合成一液晶單體CCM，同時具有熱向型及溶致型液晶的特性，以FT-IR、1H-NMR、SAXS鑑定分子結構，TGA、DSC和POM分析其熱性質及液晶特質，探討其分子排列及溫度效應對選擇性光反射波段的影響。本研究經原子轉移自由基聚合法合成新穎性二嵌段共聚高分子PS-b-PCCM及經活性自由基聚合法合成新穎性共聚物PCCM以1H-NMR和GPC鑑定分子結構，POM和DSC分析其液晶相，所合成的二嵌段共聚物重量平均分子量約為1.2×〖10〗^5~2.2×〖10〗^5 gmol-1。本研究合成之均聚高分子和共聚高分子均不具液晶相性質。而本研究所合成之兩性液晶單體CCM，其熱向型液晶之液晶相範圍大於90°C，為膽固醇液晶相；而溶致型液晶之液晶相存在於低於60°C，濃度約介於60至65 wt % 之間，為膽固醇液晶相。單體超過聚合溫度形成之部分聚合膽固醇液晶，具有較有秩序性的分子排列，以及較明顯的選擇性光反射性質。單體之溶致型液晶態，具最佳的分子有秩序性排列，及效率優良之選擇性光反射性質，其反射可見光的特性，可以設計為溶劑感測器。

In this work, we synthesized a liquid crystalline monomer CCM, which possess amphotropic liquid crystalline properties. Dependence of selective reflection on molecular arrangement and temperature effects were studied. Furthermore, a novel diblock copolymer PS-b-PCCM was synthesized via ATRP method and a homopolymer PCCM was synthesized using AIBN. The amphotropic liquid crystalline monomer CCM shows thermotropic cholesteric liquid crystal phase at a temperature higher than 90°C. Lyotropic cholesteric liquid crystal state exists in some proper solvents. Increase of temperature to a specific point, some CCM monomers were found to be polymerized. The partially polymerized cholesteric liquid crystal shows some higher order and more significant selective reflection. The results of lyotropic liquid crystalline CCM suggest that this predesigned CCM is available for using as a solvent sensor and tunable bandgap filter.

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