Synthesis and Characterization of Liquid Crystalline Polymers Containing Bis(4-Hydroxyphenyl)-Methanone and Studies on Their Engineering Plastics Blends

本文概括地介绍了高分子液晶的发展史的分类、合成方法、性能、高分子液晶的结构与性能的关系、二羟基二苯酮型液晶共聚酯、液晶聚酰亚胺、固相后聚合、高分子液晶共混物、以及高分子液晶及其原位复合材料的应用。以4,4'－二羟基二苯酮为单体之一，利用直接熔融缩聚和界面缩聚等方法合成了一系列的热致液晶共聚酯和聚酯酰亚胺。采用示差扫描热分析法，广角X－射线衍射法，偏光显微镜，红外光谱，电子显微镜，流变仪，力学性能测试仪等对聚合物进行表征。In this thesis, three sections contents are discussed. First, the historical development, systematical and fine classification, synthesis methods, properties, properties - structure relationship of liquid crystalline polymers, copolyesters and polyesterimides, application of liquid crystalline polymers and in-situ composites, are reviewed in brief. Second, a series of thermotropic liquid crystalline copolyesters and polyesterimides containing bis(4-hydroxyphenyl)methanone has been synthesized by direct melting polycondenzation and interfacial polymerization. Third, some engineering plastics ABS, PES-C, PEK-C and PI are blended with the liquid crystalline polymers