聚西夫碱型共轭高分子的合成及电性能的研究

从乙二醛、对苯二醛与二元胺反应得到八种线型共轭结构的缩聚物。在模型化合物及其对应的聚合物的紫外、可见吸收光谱显示出随分子共轭程度的增加向长波位移。乙二醛与对苯二胺的缩聚物热处理后使结构芳香化,而对苯二醛与对苯二胺缩聚物在350℃以下热处理时,仍发生进一步缩聚反应。缩聚物的导电性能与分子的共轭程度及分子间的结构有关。

STUDIES ON THE SYNTHESES AND ELECTRIC PROPERTIES OF CONJUGATED MACROMOLECULES OF POLYSCHIFF''S BASE

Eight linear conjugated compounds have been synthesized by reacting terephthal-dehyde and glyoxal with aromatic diamineg. The UV-Vis. spectra of the model compounds and their corresponding polymers revealed that the absorption bands shift toward the long-wave region as the degree of conjugation increases.It was shown from the structure of the condensation product of glyoxal and p-phenylene diamine that the aromatization occurs after heat-treatment, but in case of condensation of terephthaldhyde with p-phenylene diamine further polycondensation instead of aromatization took place during the heat-treatment below 350℃. Electric properties of the polymers depend not only on the degree of conjugation in molecules but also the structure between molecules.