LIQUID-CRYSTALLINE EPOXIDE THERMOSETS

作     者：JAHROMI, S MIJS, WJ 

作者机构：[a]Department of Polymer Technology Faculty of Chemical Engineering and Materials Science Delft University of Technology P.O. Box 5045 2600 GA Delft The Netherlands 

出 版 物：《MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS》 (分子晶体与液晶)

年 卷 期：1994年第250卷第1期

页      面：209-222页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

主　　题：ORDERED NETWORKS LC DIEPOXIDE UV-DICHROISM THERMOSETS 

摘      要：Highly ordered networks were produced by copolymerization of a low molecular weight liquid crystalline (LC) diepoxide with an aromatic diamine. A series of aromatic diamines was synthesized and their Polymerization reaction with the LC-diepoxide was studied by means of differential scanning calorimetry. By adjusting the melting point of the crosslinking agents an eutectic LC mixture was found on which all the physical measurements were carried out. The degree of order of a certain dye guest in the polymer networks as determined by UV-dichroism was 0.76. Birefringence measurements have confirmed that about the same level of ordering can be maintained up to the thermal degradation point (i.e., 300 degrees C). Microscopy and X-ray studies have revealed that the epoxy-amine mixture is transformed from a nematic to a smectic phase, as a result of the polymerization reaction at 120 degrees C.