The diamine, 9,9-bis[4-(4-amino-3-hydroxylphenoxy)phenyl]fluorene (BAHPPF) was synthesized by the modified two-step method. Then, a series of acetate-containing copoly(ether-imide)s were prepared by the copolymerization of BAHPPF, 9,9-bis(4-aminophenyl)fluorene (BAF) and 2,2′-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) followed by chemical imidization. The structures and properties of the BAHPPF and copoly(ether-imide)s were characterized by nuclear magnetic resonance spectrometer (NMR), Fourier transform infrared spectrometer (FTIR), X-ray diffractometer (XRD), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), ultraviolet-visible spectrophotometer (UV-VIS), and tensile testing. Single gas permeation performances of these copoly(ether-imide)s were also studied for five representative gases of interest including H2, O2, N2, CO2, and CH4. The experimental results showed that the copoly(ether-imide)s showed excellent optical properties with high light transmittance above 80.2% at 450 nm. The glass transition temperature of these copolymers were higher than 333°C. Their tensile strength and Young’s module also increased, and the elongation decreased with the decrease of BAHPPF. High gas permeabilities of copoly(ether-imide)s were obtained, and the ideal selectivity of CO2/CH4 was improved due to the introduction of acetate group and flexible ether linkage. These copoly(ether-imide)s could be applied to the field of optics and gas separation.

中文翻译：

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基于 6FDA 和芴二胺的含醋酸酯共聚（醚-酰亚胺）的光学、热和气体分离性能

二胺，9,9-双[4-（4-氨基-3-羟基苯氧基）苯基]芴（BAHPPF）是通过改进的两步法合成的。然后，通过 BAHPPF、9,9-双（4-氨基苯基）芴（BAF）和 2,2'-双（3,4-二羧基苯基）共聚制备了一系列含乙酸酯的共聚（醚-酰亚胺）。 )六氟丙烷二酐 (6FDA)，然后进行化学酰亚胺化。BAHPPF 和共聚（醚-酰亚胺）的结构和性质通过核磁共振光谱仪 (NMR)、傅里叶变换红外光谱仪 (FTIR)、X 射线衍射仪 (XRD)、差示扫描量热仪 (DSC)、热重分析仪表征。分析仪 (TGA)、紫外-可见分光光度计 (UV-VIS) 和拉伸测试。还研究了这些共聚（醚-酰亚胺）对五种感兴趣的代表性气体（包括 H2、O2、N2、CO2 和 CH4）的单一气体渗透性能。实验结果表明，共聚（醚-酰亚胺）显示出优异的光学性能，在 450 nm 处具有高于 80.2% 的高透光率。这些共聚物的玻璃化转变温度高于 333°C。它们的抗拉强度和杨氏模量也随着BAHPPF的减少而增加，伸长率也随之降低。获得了共聚（醚-酰亚胺）的高透气性，并且由于引入了乙酸酯基团和灵活的醚键，提高了 CO2/CH4 的理想选择性。这些共聚（醚-酰亚胺）可应用于光学和气体分离领域。实验结果表明，共聚（醚-酰亚胺）显示出优异的光学性能，在 450 nm 处具有高于 80.2% 的高透光率。这些共聚物的玻璃化转变温度高于 333°C。它们的抗拉强度和杨氏模量也随着BAHPPF的减少而增加，伸长率也随之降低。获得了共聚（醚-酰亚胺）的高透气性，并且由于引入了乙酸酯基团和灵活的醚键，提高了 CO2/CH4 的理想选择性。这些共聚（醚-酰亚胺）可应用于光学和气体分离领域。实验结果表明，共聚（醚-酰亚胺）显示出优异的光学性能，在 450 nm 处具有高于 80.2% 的高透光率。这些共聚物的玻璃化转变温度高于 333°C。它们的抗拉强度和杨氏模量也随着BAHPPF的减少而增加，伸长率也随之降低。获得了共聚（醚-酰亚胺）的高透气性，并且由于引入了乙酸酯基团和灵活的醚键，提高了 CO2/CH4 的理想选择性。这些共聚（醚-酰亚胺）可应用于光学和气体分离领域。且伸长率随着 BAHPPF 的降低而降低。获得了共聚（醚-酰亚胺）的高透气性，并且由于引入了乙酸酯基团和灵活的醚键，提高了 CO2/CH4 的理想选择性。这些共聚（醚-酰亚胺）可应用于光学和气体分离领域。且伸长率随着 BAHPPF 的降低而降低。获得了共聚（醚-酰亚胺）的高透气性，并且由于引入了乙酸酯基团和灵活的醚键，提高了 CO2/CH4 的理想选择性。这些共聚（醚-酰亚胺）可应用于光学和气体分离领域。