合成具壓克力基雙分子單一成分/混摻旋光液晶材料及穩定藍相液晶之研究

Abstract

本文實驗合成一系列不對稱雙分子單一成分/混摻旋光液晶材料，利用H1-NMR、EA作為結構鑑定。並在照光聚合前後以POM探討其液晶行為。 我們成功合成具有壓克力基的雙分子A66CB摻入旋光材料ZLI-4572、S811皆得到藍相。在藍相下照光聚合後發現當A66CB混摻4wt%的ZLI-4572照光聚合後藍相溫寬可以拓展至約21 °C。此外，我們將具有壓克力基雙分子中引入旋光中心成功合成出單一分子的藍相液晶A66*CB，有3 °C的藍相溫度範圍。 利用A66*CB混摻76*CB與RM257混摻76*CB作比較，發現當A66*CB混摻76*CB比例為10：90時，有最寬廣的藍相溫度範圍約5 °C，且照光聚合後藍相溫度範圍也會增加。發現了皆扮演反應型單體的 A66*CB與RM257，在照光聚合後A66*CB對於穩定藍相溫寬比RM257來的更好。

We synthesize a series of asymmetric bimolecular single component / blending chiral liquid crystal material, and the chemical structures of these compounds were characterized by H1-NMR、EA, and the liquid crystalline phases before and after the illumination polymerization behavior of all compounds were identified from the result of POM. We have successfully synthesized bimolecular acrylate group material A66CB doped with ZLI-4572, S811 and the blue phase are obtained. When A66CB blends 4wt% of ZLI-457 under illuminated polymerization in blue phase, the widest blue phase temperature can be extended to about 21 °C. In addition, single molecule blue phase dimers A66*CB, which have chiral center in the central of molecular, were synthesized. We synthesize the dimer A66*CB with acrylate group that introduced chiral center successfully has the blue-phase range about 3 °C by single component. Using the A66*CB blending 76*CB and RM257 blending 76*CB for comparison and found that when A66*CB blends 76*CB (10:90), there is the widest blue phase temperature range about 5 °C, and after illuminated polymerization, the blue-phase temperature range will increase. The reactive dimer A66*CB and RM257 after illuminated polymerization in blue-phase, we discovered that A66*CB series can stabilize the blue-phase range better than RM257.