Selenide-containing soluble polyimides: High refractive index and redox responsiveness
Selenide-containing soluble polyimides: High refractive index and redox responsiveness
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含硒化物可溶性聚酰亚胺：高折射率和氧化还原响应性
DOI：
10.1016/j.eurpolymj.2019.109358
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发表时间：
2020-01-05
影响因子：
6
通讯作者：
Zhu, Xiulin
中科院分区：
文献类型：
--
作者：
Li, Qilong;Liu, Shaoxiang;Zhu, Xiulin
可溶性高折射率聚酰亚胺由于其易于加工和多功能性而在光学器件中具有广泛的应用。本工作设计并通过胺-二酐缩聚法合成了含硒聚酰亚胺。以双（3-三氟甲基-4-氨基苯基）硒化物（BTFAPS）和双（4-氨基苯基）硒化物（BAPS）为含硒二胺，与4，4 ′-（六氟异亚丙基）二邻苯二甲酸酐（6 FDA）反应，制备了含硒聚酰亚胺。与含氧和含硫的PI相比，含硒PI具有更好的溶解性，更高的折射率，并能带来氧化还原响应性。这是由于三氟甲基碱具有大的自由体积，硒元素具有比硫更高的摩尔折射率和氧化还原活性。采用核磁共振、凝胶渗透色谱、傅立叶变换红外光谱和广角X射线衍射等技术对聚合物结构进行了表征。采用差示扫描量热法、热重分析法、紫外-可见光谱法、椭圆偏振光谱法和X射线光电子能谱对聚合物的性能进行了表征。
Soluble high refractive index polyimides have extensive applications in optical devices due to their ease of processing and versatility. In this work, selenide-containing polyimides were designed and synthesized via amine-dianhydride polycondensation. Two selenide containing diamines, e.g. bis(3-trifluoromethyl-4-aminophenyl)selenide (BTFAPS) and bis(4-aminophenyl)selenide (BAPS) were reacted with 4,4'(Hexafluoroisopropylidene)diphthalic anhydride (6FDA) for the preparation of selenide containing polyimides. Comparison with its oxygen and sulfur counterparts, the selenide-containing PIs have better solubility, higher refractive index, and can bring redox responsiveness. This is due to the trifluoromethyl base, which possesses a large free volume, and the selenium element, which has a higher molar refraction and redox activities than even sulfur. Various techniques, such as nuclear magnetic resonance, gel permeation chromatography, Fourier transformed infrared spectroscopy and wide angle X-ray diffraction were used for characterizing the polymers structure. Differential scanning calorimetry, thermogravimetric analysis, ultraviolet-visible spectroscopy, spectroscopic ellipsometry and X-ray photoelectron spectroscopy were used to characterize the properties of the polymers.