研究生: |
王玉楓 Wang, Yu-Feng |
---|---|
論文名稱: |
含桂皮酸衍生基液晶高分子之合成與性質研究 Synthesis and Characterization of Liquid Crystal Polymers with Cinnamoyl Derivatives |
指導教授: |
李育德
Lee, Yu-Der |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 化學工程學系 Department of Chemical Engineering |
論文出版年: | 2009 |
畢業學年度: | 97 |
語文別: | 中文 |
論文頁數: | 73 |
中文關鍵詞: | 桂皮酸 、液晶高分子 、光反應基 、對掌性 、螺旋距 、偏光膜 |
相關次數: | 點閱:2 下載:0 |
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本研究合成含桂皮酸光反應基之液晶單體(cinC6MCl/cinC8MCl/
cinC10MCl)與含有對掌性薄荷醇官能基之單體(C6ML/C8ML),以自由基聚合之方法合成側鏈型液晶高分子,希望能作為反射式偏光膜之材料。
所合成出來的化合物與高分子均使用核磁共振光譜(1H-NMR)與紅外線光譜(FT-IR)鑑定其化學結構。共聚物則利用薄荷醇官能基上的特殊訊號,決定共聚物實際之莫耳組成。使用熱重分析儀(TGA)與微差熱掃瞄卡計分析儀(DSC)得到各化合物的裂解溫度與熱性質之鑑定
,再使用偏光顯微鏡(POM)鑑定其液晶相的紋理結構。在高分子的分析上,使用凝膠層析儀(GPC)測得高分子的平均分子量與分子量分佈
,其分子量之分佈在1.1~1.4左右,而高分子的熱裂解溫度均在310℃以上,為耐熱性良好之材料。均聚物PC8與PC10為雙變式液晶,共聚物PC6ML-18與PC8ML-18為單變式膽固醇型液晶,共聚物PC6ML-14與PC8ML-14則沒有明顯之液晶行為。
具有桂皮酸光反應基之化合物,在不同UV曝光量下對於特定波長之吸收有明顯的下降趨勢,再藉由1H-NMR的鑑定,確認在UV光照射下會進行E-Z結構異構化,可以用此特性來調控材料之螺旋梯度範圍。
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