Effect of trifluoromethyl groups on properties of aromatic and semi-aromatic polyimides for space applications
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F25%3A39923073" target="_blank" >RIV/00216275:25310/25:39923073 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007/s10853-025-11148-2" target="_blank" >https://link.springer.com/article/10.1007/s10853-025-11148-2</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10853-025-11148-2" target="_blank" >10.1007/s10853-025-11148-2</a>
Alternative languages
Result language
angličtina
Original language name
Effect of trifluoromethyl groups on properties of aromatic and semi-aromatic polyimides for space applications
Original language description
Aromatic polyimides have become popular due to their exceptional properties, including superior thermal resistance. However, these materials have a strong absorption in the UV-vis region, which limits their applications, including those for a space environment. The effect of trifluoromethyl groups in aromatic and semi-aromatic polyimide structures on their final characteristics, specifically optical, thermal, and mechanical properties, solar absorptance, emissivity, and outgassing, was investigated to develop high-performance materials suitable for space applications. As the starting dianhydride monomers, 1,2,4,5-cyclohexanetetracarboxylic dianhydride (CHDA) and 4,4 '-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) were used to react with different diamine monomers, specifically 4,4 '-oxydianiline (ODA), 4,4 '-oxybis[3-(trifluoromethyl)aniline] (6FODA), 1,4-bis(4-aminophenoxy)benzene (APB), and 1,4-bis(4-amino-2-trifluoromethylphenoxy)benzene (6FAPB). It was found that trifluoromethyl groups positively affected the thermal and optical properties of polyimide films. The thermal stability of the 6FDA-based polyimides exceeded 500 degrees C. The fully fluorinated polyimide films of poly(6FDA-6FODA) and poly(6FDA-6FAPB) exhibited transmittance at 400 nm (T400) of 53% and 44%, respectively, whereas their partly fluorinated analogues of poly(6FDA-ODA) and poly (6FDA-APB) showed T400 of 3% and 10%, respectively. Moreover, the presence of trifluoromethyl groups improved outgassing results, where the fully aromatic poly(6FDA-6FAPB) film achieved the best performance. In contrast to the CHDA-based polyimides, all 6FDA-based polyimides achieved the total mass loss values (TML) < 1, which meets one of the essential requirements for space applications.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Materials Science
ISSN
0022-2461
e-ISSN
1573-4803
Volume of the periodical
60
Issue of the periodical within the volume
32
Country of publishing house
DE - GERMANY
Number of pages
15
Pages from-to
14221-14235
UT code for WoS article
001551383100001
EID of the result in the Scopus database
2-s2.0-105013377801