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以3,3′,4,4′-二苯甲酮四羧酸二酐(BTDA)和2,4-二氨基-6-甲基-1,3,5-三嗪(DMT)为原料,利用化学亚胺化和热亚胺化制备新型可溶性主链含嗪环的聚酰亚胺(PI),即PI-1和PI-2,并且对它们的分子结构、溶解性、结晶性、热稳定性和电化学行为进行研究。结果表明,无论利用化学亚胺化还是热亚胺化均能成功将聚酰胺酸转变为PI。两种PI均易溶于DMF、DMAC、DMSO和NMP等极性非质子溶剂中。PI-1和PI-2是部分结晶聚合物,PI-2的结晶度更高。PI-1和PI-2均具有较高的热稳定性,PI-2的热稳定性优于PI-1。此外,PI-1和PI-2在DMSO溶液中具有明显的电化学氧化-还原行为。
Using 3,3 ’, 4,4’-benzophenonetetracarboxylic dianhydride (BTDA) and 2,4-diamino-6-methyl-1,3,5-triazine (DMT) as raw materials, Novel polyimide main chains containing polyimide rings (PIs), PI-1 and PI-2, were prepared by chemical imidization and thermal imidization, and their molecular structures, solubility, crystallinity, heat Stability and electrochemical behavior of the study. The results show that the polyamic acid can be successfully converted to PI whether using chemical imidization or thermal imidization. Both PIs are readily soluble in polar aprotic solvents such as DMF, DMAC, DMSO and NMP. PI-1 and PI-2 are partially crystalline polymers with higher crystallinity of PI-2. PI-1 and PI-2 have higher thermal stability, PI-2 thermal stability than PI-1. In addition, PI-1 and PI-2 have obvious electrochemical oxidation-reduction behavior in DMSO solution.