| Anhydrous proton-conducting properties of triazole-phosphonic acid copolymers: a combined study with MAS NMR. | |
| | |
MedLine Citation:
|
PMID: 18825294 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The synthesis, thermal and proton conducting properties of copolymers based on vinylphosphonic acid (VPA) and 1-vinyl-1,2,4-triazole (VTri) were investigated. The copolymers were synthesized by free-radical copolymerization of the corresponding monomers at several monomer feed ratios to obtain poly(VPA-co-VTri) copolymer electrolytes. The final structures of the copolymers were confirmed by spectroscopic methods. The composition of the low molecular weight copolymers was varied with the feed ratio of the monomers. The presence of triazole units in the copolymers suppresses the formation of phosphonic acid anhydrides up to 150 degrees C, as verified by both (31)P NMR and TGA. The observation of defined glass transition temperatures indicated that the ionic interactions do not prevent segmental relaxations of the polymer chains. In the absence of humidity, the copolymer electrolyte, poly(VPA-co-VTri), S2 (with 33% triazole content) showed proton conductivity of 10(-3) S cm(-1) at 120 degrees C, which is far higher than in imidazole based copolymers. Two different types of hydrogen-bonded protons were detected by (1)H MAS NMR in the solid copolymer systems, due to different arrangements of triazole and phosphonic acid units. |
| | |
Authors:
|
Sevim U Celik; Umit Akbey; Robert Graf; Ayhan Bozkurt; Hans W Spiess |
Related Documents
:
|
12001244 - Dentin proteoglycans: an immunocytochemical feisem study. 17658454 - Impact of brushing force on abrasion of acid-softened and sound enamel. 20652374 - Poly(2-hydroxyethyl methacrylate-co-dodecyl methacrylate-co-acrylic acid): synthesis, p... 19399764 - Positive mode electrospray tandem mass spectrometry of poly(methacrylic acid) oligomers. 7914864 - Dietary lipids and adipose tissue fatty acids in the marmoset monkey (callithrix jacchus). 19907084 - A gold electrode modified with self-assembled diethylenetriaminepentaacetic acid via ch... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-08-20 |
Journal Detail:
|
Title: Physical chemistry chemical physics : PCCP Volume: 10 ISSN: 1463-9076 ISO Abbreviation: Phys Chem Chem Phys Publication Date: 2008 Oct |
Date Detail:
|
Created Date: 2008-09-30 Completed Date: 2008-12-19 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100888160 Medline TA: Phys Chem Chem Phys Country: England |
Other Details:
|
Languages: eng Pagination: 6058-66 Citation Subset: IM |
Affiliation:
|
Fatih University, Department of Chemistry, Büyükçekmece-Istanbul, Turkey. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Carbon Isotopes Electric Conductivity Electrolytes / chemical synthesis, chemistry Hydrogen Bonding Magnetic Resonance Spectroscopy / methods*, standards Molecular Structure Molecular Weight Phosphonic Acids / chemistry* Phosphorus Isotopes Polymers / chemical synthesis, chemistry* Protons* Reference Standards Temperature Triazoles / chemistry* Vinyl Compounds / chemistry* |
| Chemical | |
Reg. No./Substance:
|
0/1-vinyl-1,2,4-triazole; 0/Carbon Isotopes; 0/Electrolytes; 0/Phosphonic Acids; 0/Phosphorus Isotopes; 0/Polymers; 0/Protons; 0/Triazoles; 0/Vinyl Compounds; 1746-03-8/vinylphosphonic acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Coadsorbed H and CO interaction on platinum.
Next Document: Systemic therapy of metastasizing renal cell carcinoma