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合成了三氨基单体-1,3,5-三(4-氨基苯氧基)苯(TAPOB),利用其和二酸酐单体-双酚A二酸酐(BPADA)反应,制备了端酸酐基超支化聚酰胺酸和超支化聚酰亚胺。通过红外光谱和核磁谱图检测,表明得到了目标聚合物。超支化聚酰亚胺具有中等分子量和较宽的分子量分布,进一步测试表明,聚合物的特征黏度和线性聚酰亚胺相比较低很多。超支化聚酰亚胺保留了线性聚酰亚胺的优良热性能,同时超支化聚合物溶解性能大为改善,在室温下可溶解于常见的强极性溶剂。
The triamino-1,3,5-tris (4-aminophenoxy) benzene (TAPOB) was synthesized and its terminal acid anhydride group was prepared by the reaction with dianhydride monomer - bisphenol A dianhydride (BPADA) Hyperbranched polyamic acid and hyperbranched polyimide. By infrared spectroscopy and nuclear magnetic resonance spectroscopy detection, indicating that the target polymer. Hyperbranched polyimides have medium molecular weight and broad molecular weight distribution. Further tests show that the intrinsic viscosity of polymers is much lower than that of linear polyimides. Hyperbranched polyimide retains the excellent thermal properties of linear polyimides, while the solubility of hyperbranched polymers is greatly improved and is soluble in common strong polar solvents at room temperature.