Polyurethanes based on the aminoethers of -phosphoric acid and polyisocyanates of an aliphatic nature were studied as a substrate for the preparation of new polymer electrolyte. The conductivity of polyurethane ionomer samples obtained using the optimal amount of aliphatic polyisocyanates and after keeping them in a 1 M LiBF solution in γ-butyrolactone reaches 0.62 mS cm. It has been established that the transport of positively charged ions through the polymer matrix is due to the formation of clusters of phosphate ions and their association into the conducting channels. The introduction of carboxylate ions into the conducting channels by modifying the aminoethers of -phosphoric acid with phthalic anhydride leads to an increase in their size and rise in the mobility of cations. As a result, the conductivity of polyurethane gel electrolytes increased to 2.1 mS cm.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9034089 | PMC |
| http://dx.doi.org/10.1039/d1ra01312b | DOI Listing |
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Catalytic Etherification of -Phosphoric Acid for the Synthesis of Polyurethane Ionomer Films.
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Institute of Physics, Kazan Federal University, 18 Kremlevskaya str., Kazan 420008, Russia.
Article Synopsis
- The study focuses on the etherification reaction of -phosphoric acid (OPA) with polyoxypropylene glycol, using triethanolamine (TEOA) and triethylamine (TEA) as catalysts under low-temperature conditions.
- It finds that triethylamine leads to complete etherification, resulting in branched OPA ethers and possible polyphosphate structures, while triethanolamine causes incomplete etherification, leaving some phosphate anions unreacted.
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Polyurethanes based on the aminoethers of -phosphoric acid and polyisocyanates of an aliphatic nature were studied as a substrate for the preparation of new polymer electrolyte. The conductivity of polyurethane ionomer samples obtained using the optimal amount of aliphatic polyisocyanates and after keeping them in a 1 M LiBF solution in γ-butyrolactone reaches 0.62 mS cm.
View Article and Find Full Text PDFOrganophosphorus Polyurethane Ionomers as Water Vapor Permeable and Pervaporation Membranes.
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Department of Chemical Process Engineering, Kazan National Research Technological University, 68 Karl Marx st., Kazan 420015, Russia.
Organophosphorus polyurethane ionomers (AEPA-PU) based on aminoethers of -phosphoric acid (AEPA) were obtained and studied as pervaporation membrane materials for separating isopropanol/water mixtures. The regularities of the change in the water vapor permeability of AEPA-PU were also investigated. It has been established that an increase of solute content in the composition of the urethane-forming system and the content of ionogenic groups in AEPA leads to a noticeable increase in the vapor permeability of the resulting film materials.
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