In 2019,Journal of Polymer Science, Part A: Polymer Chemistry included an article by Park, Junghwa; Park, Yongman; Kim, Dukjoon. Application of 33100-27-5. The article was titled 《Chemical stability enhancement of crown ether grafted sulfonated poly(arylene ether ketone) fuel cell membrane by cerium ion fixation》. The information in the text is summarized as follows:
In operation of polymer electrolyte membrane fuel cell or direct methanol fuel cell, ·OH radicals are the major cause for the degradation of polymer electrolyte membrane. In order to enhance its antioxidation stability, cerium ion (Ce3+, CE), an ·OH radical quencher, is introduced to membrane, as it converts the ·OH radicals into inactive chems. In this study, aminoethyl-15-crown-5 (CRE) is grafted on the sulfonated poly(arylene ether ketone) (SPAEK) to prevent the migration of CE ions from the membrane for long-term antioxidation stability, as CRE forms a coordination complex with CE. The chem. and phys. structures of the CRE grafted SPAEK are examined using proton NMR, energy dispersive X-ray, and small-angle X-ray scattering spectroscopy. The phys. properties of the CRE grafted SPAEK membrane are investigated and compared with those of the CRE blended and CE blended ones. While the grafting of CRE does not significantly affect the thermal and mech. and water uptake behaviors of membranes, it leads to a significant improvement of antidegrdn. effect compared with other blend systems according to Fenton’s test. The proton conductivity decreases with addition of CE but its effect is lessened by introduction of CRE. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018.1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Application of 33100-27-5) was used in this study.
1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Application of 33100-27-5
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem