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将酚酞分别和对氯硝基苯、2-氯-5-硝基三氟甲苯经Williamson反应得到3,3-双[(4-硝基苯氧基)苯基]酚酞和3,3-双[(4-硝基-2-三氟甲基苯氧基)苯基]酚酞;在Pd/C-水合肼还原作用下分别得到3,3-双[(4-氨基苯氧基)苯基]酚酞(Ⅰ)和3,3-双[(4-氨基-2-三氟甲基苯氧基)苯基]酚酞(Ⅱ).采用上述2种二胺单体分别与1,2,3,4-环丁烷四酸二酐(CBDA)、均苯四甲酸二酐(PMDA)、3,3,4,4-二苯醚四酸二酐(ODPA)和六氟二酐(6FDA)通过两步法制备出8种含酚酞基团的聚酰亚胺(PI)薄膜,然后采用核磁(NMR)、红外光谱(FTIR)、X-射线衍射仪(XRD)、紫外-可见分光光度计(UV-Vis)、热重分析仪(TGA)、示差扫描量热仪(DSC)和溶解性测试等测试手段和方法对所得到的PI的化学结构、光学性能、热性能和和溶解性等性质进行表征.研究结果表明,这些PI主要表现出非晶结构,且具有良好的溶解性和热性能;除PMDA基PI外,其余PI均表现出良好的浅色、透明特性.
Phenolphthalein and 3-bis [(4-nitrophenoxy) phenyl] phenolphthalein and 3, 3-bis [(4-nitro-2-trifluoromethylphenoxy) phenyl] phenolphthalein; 3,3-bis [(4-aminophenoxy) phenyl Phenolphthalein (Ⅰ) and 3,3-bis [(4-amino-2-trifluoromethylphenoxy) phenyl] phenolphthalein (Ⅱ) , 4-cyclobutanetetracarboxylic dianhydride (CBDA), pyromellitic dianhydride (PMDA), 3,3,4,4-diphenyl ethertetracarboxylic dianhydride (ODPA) and hexafluoro dianhydride (6FDA) Eight kinds of PI films with phenolphthalein groups were prepared by two steps, and then were characterized by NMR, FTIR, XRD and UV - Vis spectrophotometer The chemical structure, optical properties, thermal properties and solubility of the obtained PI were measured by means of UV-Vis, TGA, DSC and solubility test The results showed that these PIs mainly showed amorphous structure and had good solubility and thermal properties. All the PIs except PMDA-based PI showed Good light-colored, transparent property.