含液晶基元的缩聚单体及其序列嵌段共聚物的合成

SYNTHESIS OF A MESOGENIC CONDENSATION MONOMER AND THE SEQUENTIAL BLOCK COPOLYMERS THEREOF

本文介绍了含液晶基元的缩聚单体的合成,2-甲基-1,4-苯撑双(4-氯甲酰)苯甲酸酯,以及由此单体与1,10-癸二醇、聚环氧丙烷二醇合成的含液晶性及非液晶性两种序列结构的嵌段共聚物。聚合物的液晶态性质由偏光显微镜和DSC进行初步表征。在研完中观察到:在对数比浓粘度较大的样品的DSC图中、在熔点之后存在一显著放热峰。这种异常现象可能意味着液晶态分子的另外一种分子运动。

This paper deals with the synthesis of mesogenic condensation monomer, 2-methyl-1, 4-phenylene bis(4-chloroformyl) benzoate. The liquid crystalline non-liquid-crystalline sequential block copolymers made from this mesogenic monomer and 1,10-decanediol and poly (propylene glycol) are also discussed. In the DSC thermograms of the samples with higher inherent viscosity, a marked exothermic peak is found to exist after the melting of the samples. This unusual phenomenon may have suggested an additional organization of the molecules in the liquid crystalline state.