Liquid crystalline epoxides with long lateral substituents : Synthesis and curing
Liquid crystalline epoxides with long lateral substituents : Synthesis and curing
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DOI：
10.1016/j.eurpolymj.2006.02.015
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发表时间：
2006-08
影响因子：
6
通讯作者：
Yiquan Zheng;Min-Min Shen-Min;Mangeng Lu;Shaoping Ren
中科院分区：
文献类型：
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作者：
Yiquan Zheng;Min-Min Shen-Min;Mangeng Lu;Shaoping Ren
合成了一系列侧链取代基长为4~12个碳原子的液晶环氧化物，并用1H核磁共振、红外光谱、差示扫描量热法(DSC)、偏光显微镜(POM)对其进行了表征。用偏光显微镜和X射线光电子能谱分析了LCE与DDM的固化产物。研究了环氧化物和芳香胺的固化动力学。用Ozawa法测定并比较了所有LC环氧化物的固化活化能，分别为43.3~53.2kJmoL−1。活化能的变化表明，反应活性取决于侧基，因为侧基平行于棒状核心，可以作为结合溶剂。
A series of liquid crystalline epoxides with long lateral substituent from 4 to 12 carbon atoms was synthesized and characterized by1H NMR, FTIR spectroscopy, differential scanning calorimetry (DSC), polarized light optical microscopy (POM). The curing products of the LCE with DDM, was analyzed by POM and WAXS. The cure kinetics of epoxides and aromatic amine was investigated. The curing activation energy about 43.3–53.2kJmol−1was determined and compared for all the LC epoxides through Ozawa method. The change of activation energy suggests that the reaction active depends upon the lateral substituents, because the lateral substituents parallel to the rod-like core and can act as bound solvent.