Journal
ACS APPLIED POLYMER MATERIALS
Volume 3, Issue 10, Pages 4932-4939Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.1c00694
Keywords
poly(benzoxazole); polyimide; polymer optics; optical properties; high refractive index
Funding
- Korea Institute of Science and Technology Institutional (KIST) Program
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20183010025470]
- project 'The development of stiffened panel and 'C, 'Z' channel using thermoplastic unidirectional tape made with PPS, PEEK resin and carbon fiber contents of more than 60 wt %' - Ministry of Trade, Industry and Energy (MOTIE, Korea) [10076849]
- Korea Evaluation Institute of Industrial Technology (KEIT)
- Ministry of Trade, Industry & Energy(MOTIE) of the Republic of Korea [20011577, 20011153]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20011153, 20011577, 20183010025470] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A series of aromatic polybenzoxazoles (PBOs) containing sulfur atoms in their main chains have been developed, showing high thermal stability and decomposition temperature. One of the PBOs exhibits an extremely high refractive index due to its high sulfur content.
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 degrees C), and glass-transition temperature (204-255 degrees 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%).
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