Effect of trifluoromethyl groups on properties of aromatic and semi-aromatic polyimides for space applications

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of trifluoromethyl groups on properties of aromatic and semi-aromatic polyimides for space applications

Popis výsledku v původním jazyce

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 &apos;-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) were used to react with different diamine monomers, specifically 4,4 &apos;-oxydianiline (ODA), 4,4 &apos;-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) &lt; 1, which meets one of the essential requirements for space applications.

Název v anglickém jazyce

Effect of trifluoromethyl groups on properties of aromatic and semi-aromatic polyimides for space applications

Popis výsledku anglicky

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 &apos;-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) were used to react with different diamine monomers, specifically 4,4 &apos;-oxydianiline (ODA), 4,4 &apos;-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) &lt; 1, which meets one of the essential requirements for space applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Materials Science

ISSN

0022-2461

e-ISSN

1573-4803

Svazek periodika

60

Číslo periodika v rámci svazku

32

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

15

Strana od-do

14221-14235

Kód UT WoS článku

001551383100001

EID výsledku v databázi Scopus

2-s2.0-105013377801