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聚苯撑苯并二噻唑(PBT)具有典型的溶致性液晶行为,聚合后期有液晶态搅拌乳光现象。偏光显微镜观察到具有向列型织态结构,溶液粘度随浓度变化,当进入液晶区时有明显的反常突变。对高分子链和凝聚态结构进行了X射线衍射研究,测定了晶胞参数、C轴等同周期和高分子链的取向度,并表明取向的PBT凝聚态是由刚性棒状的分子呈园柱体形态二维有序堆砌而成的。
Polybenzimidobenzodithiazole (PBT) has a typical lyotropic liquid crystal behavior, with late-stage liquid crystal emulsion optics. Polarized light microscopy was observed with a nematic weave structure, solution viscosity changes with concentration, when entering the liquid crystal region when the obvious abnormal mutation. X-ray diffraction of polymer chains and condensed structures was carried out. The parameters of unit cell, C-axis equivalent period and the degree of orientation of polymer chains were determined. It was shown that the oriented PBT condensed state was composed of rigid rod-shaped molecules Two-dimensional form of orderly piled form.