热致液晶聚芳酯的结构和相变

Structure and Transition of Thermotropic Liquid Crystalline Copolyesters

采用变温 ＷＡＸＤ、变温 ＦＴＩＲ， ＤＳＣ和热台偏光显微镜等手段对全芳族液晶共聚酯进行较全面的表征，详细地比较了液晶态和“液晶玻璃态”结构的异同，并用变温 ＦＴＩＲ得到有助于解释聚芳酯液晶多重转变的实验结果．

In this paper, the structure and transitions of three wholly aromatic liquid crystalline copolyesters, based on p-hydroxybenzoic acid, terephthalic acid and biphenols, were characterized by means of WAXD, FTIR, DSC and hot-stage polarizing microscope. A comparison between the structure of nematic and 'nematic glass' of the copolyesters is made. Preliminary FTIR results which are conducible to the interpretation of multiple transition of liquid crystalline copolyesters are reported.