Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/3203
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dc.contributor李榮和zh_TW
dc.contributor.author鄭景元zh_TW
dc.contributor.authorCheng, Ching-Yuanen_US
dc.contributor.other化學工程學系所zh_TW
dc.date2013en_US
dc.date.accessioned2014-06-06T05:31:25Z-
dc.date.available2014-06-06T05:31:25Z-
dc.identifierU0005-2108201322304600en_US
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dc.identifier.urihttp://hdl.handle.net/11455/3203-
dc.description.abstract  本研究首先合成出具 Smectic C 相之液晶單體 4-(tetradecyloxy)benzoic acid (LC),再加入間隔基成為液晶之衍生物 N-(6-hydroxyhexyl)-4-(tetradecyloxy)benzamide (C6LC),與具高反應性及反應選擇性雙官能基之建構單元 4-isocyanato-4’(3,3-dimethyl-2,4-dioxo-azetidino)diphenylmethane (IDD) 以收斂法合成出末端含液晶團基之規則樹枝狀高分子。利用 FTIR、1H-NMR、MS 及 EA 確定結構正確後,以 TGA 及 DSC 進行熱性質分析,以探討樹枝狀高分子之熱穩定性及相變化溫度。在偏光顯微鏡之觀察下,隨溫度所產生不同之光學紋理,表示分子在不同之溫度下的狀態。   由於樹枝狀高分子骨架所含的 malonamide 鍵結為親水性,而末端液晶分子所含的長碳鏈為疏水性,因此樹枝狀高分子可視為兩性型分子,及分子中所含 amide、urethane、malonamide 及 urea 官能基均可產生強氫鍵作用力,使得樹枝狀高分子有自組裝的現象。將此含液晶團基之樹枝狀高分子當作界面活性劑與 Poly(D,L-lactide) (PLA) 混摻,合適之親疏水比例的分子及適當的降低高分子溶液界面張力,可經 Breath Figure 製程形成規則蜂窩狀孔洞高分子膜。此外,兩性型樹枝狀高分子擁有良好的自組裝特性,甚至無高分子存在下都可形成蜂窩狀孔洞膜。zh_TW
dc.description.abstractIn this work, a mesogenic monomer with smectic C mesophase, 4-(tetradecyloxy)benzoic acid (LC), and its derivative, N-(6-hydroxyhexyl)-4-(tetradecyloxy)benzamide (C6LC), were synthesized. C6LC was then reacted with a building block, the dual-functional 4-isocyanato-4’(3,3-dimethyl-2,4-dioxo-azetidino)diphenylmethane (IDD) and diethyltriamine, to obtain the dendrons with peripheral mesogenic group via the convergent route. These compounds were first structurally characterized by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectrometer (NMR), mass spectrometer (MS), and elemental analyzer (EA). Subsequently the thermal stability and phase transition temperatures were studied by thermogravimeteric analysis (TGA) and differential scanning calorimeter (DSC) respectively. Optical textures at different temperatures were observed by polarized optical microscope (POM). With the abundant hydrophilic malonamide linkages in the main structure and the hydrophobic long alkyl chains at the periphery, these dendrons could be considered as amphiphiles. Moreover, these dendrons are capable of self-assembling via the strong hydrogen-bonding interactions by the amide, urethane/urea, and malonamide linkages. Therefore, these amphiphilic dendrons as the role of surfactant were blended with poly(D,L-lactide) (PLA). With the proper hydrophilic-hydrophobic balance of molecules and the appropriate reduction of interfacial tension of polymer solution, ordered honeycomb-like porous polymer films could be obtained. Furthermore, the self-assembling amphiphilic dendrons could also bring about porous films without the presence of polymer matrices.en_US
dc.description.tableofcontents誌謝辭 i 中文摘要 ii Abstract iii 目錄 iv 表目錄 vi 圖目錄 vii 代號說明 x 一、 緒論 1 二、 文獻回顧 2 2.1 液晶簡介 2 2.2 液晶分類 2 2.3 液晶高分子簡介 3 2.4 液晶規則樹枝狀高分子簡介 4 2.5 樹枝狀高分子簡介 7 2.6 自組裝與自組織簡介 8 2.7 規則蜂窩狀孔洞簡介 10 2.8 實驗動機 17 三、 實驗內容 18 3.1 藥品及溶劑 18 3.2 實驗儀器 22 3.3 實驗流程圖 24 3.4 合成步驟 26 3.4.1 合成液晶 26 3.4.2 合成含間隔基之液晶衍生物 26 3.4.3 合成 dendron 之建構單元 27 3.4.4 合成 dendrons 28 3.4.5 合成頂點改質型 dendron 30 3.5 規則蜂窩狀高分子膜之製備 32 四、 結果與討論 33 4.1 合成與鑑定 33 4.1.1 LC 之合成與鑑定 33 4.1.2 C6LC 之合成與鑑定 35 4.1.3 IDD 之合成與鑑定 37 4.1.4 G0.5-C6LC 之合成與鑑定 39 4.1.5 G1-C6LC 之合成與鑑定 41 4.1.6 G1.5-C6LC 之合成與鑑定 44 4.1.7 A-G1.5-C6LC 之合成與鑑定 46 4.2 熱性質分析 48 4.2.1 TGA 分析 48 4.2.2 DSC 分析 51 4.2.3 POM 分析 55 4.3 表面型態分析 58 4.3.1 SEM 分析 58 五、 結論 65 六、 未來展望 66 七、 參考文獻 67zh_TW
dc.language.isozh_TWen_US
dc.publisher化學工程學系所zh_TW
dc.relation.urihttp://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-2108201322304600en_US
dc.subject規則樹枝狀高分子zh_TW
dc.subjectDendronen_US
dc.subject液晶團基zh_TW
dc.subject自組裝zh_TW
dc.subject規則蜂窩狀孔洞zh_TW
dc.subjectMesogenic groupsen_US
dc.subjectSelf-assemblyen_US
dc.subjectHoneycomb-like porousen_US
dc.title含液晶團基規則樹枝狀高分子之合成及應用zh_TW
dc.titleSynthesis and Applications of Dendrons with Peripheral Mesogenic Groupsen_US
dc.typeThesis and Dissertationzh_TW
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