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Highly Refractive Aromatic Polybenzoxazoles Derived from Sulfur-Containing Dibenzoyl Chlorides
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2021-09-16 , DOI: 10.1021/acsapm.1c00694
Hyeonil Kim 1, 2 , Hyeonuk Yeo 3 , Heung Cho Ko 2 , Nam-Ho You 1
Affiliation  

A series of aromatic polybenzoxazoles (PBOs) containing sulfur atoms in their main chains were developed. All of the PBOs were prepared from synthesized hydroxyl-diamine 4,4′-bis(4-amino-3-hydroxyphenylthio)diphenylsulfide (3SDA) and aromatic diacyl chlorides, such as 4,4′-((thiobis(4,1-phenylene))bis(sulfanediyl))dibenzoyl chloride (3SDBC), trans-1,4-cyclohexanedicarbonyl dichloride (trans-CHDC), isophthaloyl dichloride (IPC), and 4,4′-oxybis(benzoyl chloride) (OBC), via a conventional two-step procedure. The PBOs exhibited high thermal stability, thermal decomposition temperature (>430 °C), and glass-transition temperature (204–255 °C). The PBO derived from 3SDA and 3SDBC exhibited a very high refractive index, i.e., 1.7862 at 637 nm due to the high sulfur content (21.79%).

中文翻译:

由含硫二苯甲酰氯衍生的高折射芳香族聚苯并恶唑

开发了一系列主链中含有硫原子的芳香族聚苯并恶唑(PBO)。所有 PBO 均由合成的羟基二胺 4,4'-双(4-氨基-3-羟基苯硫基)二苯硫醚(3SDA)和芳族二酰氯如 4,4'-((硫代双(4,1-亚苯基))双(硫烷二基))二苯甲酰氯(3SDBC)、反式-1,4-环己烷二甲酰氯(反式-CHDC)、间苯二甲酰氯(IPC)和4,4'-氧双(苯甲酰氯)(OBC),通过传统的两步程序。PBO 表现出高热稳定性、热分解温度 (>430 °C) 和玻璃化转变温度 (204–255 °C)。由于硫含量高(21.79%),源自 3SDA 和 3SDBC 的 PBO 表现出非常高的折射率,即在 637 nm 处为 1.7862。
更新日期:2021-10-08
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