Dimeric liquid crystalline thermosets from azo-containing diglycidyl ether cured by anhydride
Dimeric liquid crystalline thermosets from azo-containing diglycidyl ether cured by anhydride
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酸酐固化含偶氮二缩水甘油醚的二聚液晶热固性材料
DOI：
10.1007/s00289-010-0401-z
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发表时间：
2011-05-01
期刊：
影响因子：
3.2
通讯作者：
Lu, Man-Geng
中科院分区：
文献类型：
--
作者：
Zhou, De-Wen;Liang, Li-Yan;Lu, Man-Geng
合成了一系列具有不同长度中心间隔的含偶氮苯基二聚体液晶环氧单体，并通过1h NMR、13C NMR和元素分析对其进行了结构表征。采用差示扫描量热法（DSC）、偏光显微镜（POM）和x射线衍射仪（XRD）测定了这些单体的介生行为。与其他二聚LC环氧单体一样，这些化合物的熔点、透明点和中间相受中心间隔物碳数的影响。用酸酐固化单体，得到了具有向列相的lct。研究了其热性能、动态力学性能和紫外可见光谱。lct的分解发生在220℃附近，分为三个阶段。LCTs还具有偶氮化合物的天然吸光度键。
A series of dimeric liquid crystalline (LC) epoxy monomers containing azobenzene group with central spacers of different lengths were synthesized and structurally characterized by1H NMR,13C NMR, and elemental analysis. The mesogenic behavior of these monomers was measured by differential scanning calorimetry (DSC), polarized optical microscopy (POM), and X-ray diffraction (XRD). Like other dimeric LC epoxy monomers, the melting points, clear points, and mesophase of these compounds are influenced by the carbon numbers of central spacers. Anhydride was employed to cure the monomers and LCTs with nematic phase were obtained. Thermal properties, dynamic mechanical properties and UV–Vis spectra of the LCTs were studied. The decomposition of the LCTs occurred near 220 °C and followed three stages. The LCTs also had the natural absorbance bonds of azo compounds.