本研究利用高b值的發色團(DR19)與二異氰酸酯(2,4-TDI)為主體，利用異氰酸酯的高反應性成功的合成出分別具有液晶、urea及imide基團的高分子，將所合成的單體與高分子以FT-IR、NMR光譜鑑定其結構，利用TGA與DSC討論其熱性質，並以UV-Vis光譜觀察高分子極化後的熱安定性。
　　研究結果顯示含液晶基團聚胺酯其熱性質略差，且無法旋轉塗佈成一均勻的薄膜，而在聚胺酯主鏈中導入urea與imide基團能有效的提升其玻璃轉移溫度，其玻璃轉移溫度介於約175~230℃，並且具有優良的溶解度，且極化後薄膜在110℃下二十天仍保有80%以上的非線性光學性質。

　　In this study, we use the high b value chromophore (DR19) and the isocyanate (2,4-TDI) as the experiment base. We can successfully synthesis polymers which individually contain liquid crystal, urea, and imide group by high reactive isocyanate. We use the Fourier transform infrared spectroscopy and nucleus magnetic resonance spectrometer for characterizing these monomers and polymers. Then we use thermogravimetric analyzer and differential scanning calorimetry for studying the thermal properties. Finally, We use ultra-violet spectroscopy for measuring poled polymer films’ thermal stabilities.
　　The results show that polyurethanes containing liquid crystal group have the worse thermal properties and can’t be uniform films by spin coating. When we introduce the urea and imide group in the polyurethane mainchain, we can improve the glassy transition tempetraure efficiently. Their glassy transition tempetraures are about 175~230℃. The polymers have very good solubility. The poled polymer films contain above 80% nonlinear optical property in 110℃ after 20 days.

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