Synthesis and characterization of soluble pyridinium-containing copolyimides
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10492101" target="_blank" >RIV/00216208:11320/24:10492101 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/24:43931173
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RqnDts0Ugh" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RqnDts0Ugh</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d4ra06443g" target="_blank" >10.1039/d4ra06443g</a>
Alternative languages
Result language
angličtina
Original language name
Synthesis and characterization of soluble pyridinium-containing copolyimides
Original language description
Novel ionene-type cationic copolyimides based on 4,4 '-oxydiphthalic anhydride (ODPA), 4,4 '-(1,4-phenylenediisopropylidene)bisaniline (BIS P), and 2,6-diaminopyridine (DAP) were synthesized. The copolyimides were obtained in two stages: first, the copolyimides with the 0/1, 0.2/0.8, 0.3/0.7, 0.5/0.5, 0.6/0.4 and 1/0 DAP/Bis P ratios were obtained through thermal imidization, and then quaternization of soluble copolyimides with methyl iodide was conducted for 24 or 48 h. The samples were characterized via FTIR, NMR and EDX methods to confirm their structure and composition. The cationic copolyimides with a DAP content of less than 0.3 showed initial weight loss (onset) at about 250 degrees C, according to TGA results and demonstrated solubility in chloroform. The highest ionic conductivity value of 0.234 S cm-1 was showed by the sample with 0.3 DAP content and 0.15 degree of quaternization. The stability of the membranes in alkaline media was evaluated using FTIR and TGA. It was shown that samples with a DAP content of more than 0.3 lost their integrity probably owing to partial hydrolysis of imide rings, while copolyimides with a DAP content of 0.2 and 0.3 remained stable.
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
—
OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/EH22_008%2F0004617" target="_blank" >EH22_008/0004617: Energy conversion and storage</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
RSC Advances
ISSN
2046-2069
e-ISSN
2046-2069
Volume of the periodical
14
Issue of the periodical within the volume
50
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
37278-37285
UT code for WoS article
001359564200001
EID of the result in the Scopus database
2-s2.0-85210114812