热致液晶规则芳-脂族聚酯酰胺的结构与液晶性能

Structure and Liquid Crystalline Properties of Thermotropic Liquid Crystalline Polyesteramides with Regular Aromatic-Aliphatic Chain Structure

利用热台偏光显微镜、示差扫描量热法（ＤＳＣ）和Ｘ光衍射分析研究了规则芳－脂族聚酯酸胺的结构，包括分子量、介晶单元的空间构型、介晶单元长度，芳环取代基、扭曲结构单元、酯键与酰胺键的比例和柔性间隔基的长度等对其热致液晶性能的影响。

In this paper, the effects of the conformation of mesomorphic units, the length of mesomorphic units, molecular weight of polyesteramides, substituent on aromatic rings of mesomorphic units, the ratio of ester and amide bond in polyesteramide chain and the number of -CH2- of flexible spacers on the liquid crystalline properties of regular aromaticaliphatic polyesteramides prepared were studied by polarizing microscope, DSC and X-ray diffraction. The results show that the conformation of mesomorphic units was the most important factor of thermotropic liquid crystals for these regular aromatic-aliphatic polyesteramides prepared.