Poly(p-phenylene)s tethered with oligo(ethylene oxide): synthesis by Yamamoto polymerization and properties as solid polymer electrolytes was written by Nederstedt, Hannes;Jannasch, Patric. And the article was included in Polymer Chemistry in 2020.Name: 2-(2-Methoxyethoxy)ethanol This article mentions the following:
Salt-containing supramol. assemblies of rigid-rod polymers tethered with flexible ion-solvating side chains represent a synthetic pathway toward thin ion-conducting solid electrolyte membranes with high dimensional stability. In the present work we have synthesized poly(p-phenylene)s (PpPs) carrying di-, tri- and tetra(ethylene oxide) side chains, resp. p-dichlorophenyl oligo(ethylene oxide) monomers were polymerized by Ni-mediated Yamamoto polymerization via in situ reduction of Ni(II). This gave PpPs with an average d.p. reaching 60, where each phenylene ring carried one oligo(ethylene oxide) side chain. Results from calorimetry and X-ray scattering measurements clearly showed the formation of mol. composites, i.e., bicontinuous morphologies with mech. reinforcing layers of the stiff PpP backbones separated by the flexible oligo(ethylene oxide) side chains. This morphol. was retained after adding lithium bis(trifluoromethane)sulfonimide (LiTFSI) to form salt-in-polymer electrolytes, but with an increased distance between adjacent backbones. Furthermore, upon addition of salt the order-to-disorder transition (ODT) region increased from ∼50-170°C to ∼75-200°C at [EO]/[Li] = 20. Increasing salt concentrations also revealed a maximum in the ODT enthalpy at [EO]/[Li] = 40. At 80 and 160°C, the ionic conductivity reached 1.1 × 10-4 and 1.0 × 10-3 S cm-1, resp. Finally, we demonstrate that ionic conductivity of the polymer electrolytes can be significantly increased by additions of triglyme. In the experiment, the researchers used many compounds, for example, 2-(2-Methoxyethoxy)ethanol (cas: 111-77-3Name: 2-(2-Methoxyethoxy)ethanol).
2-(2-Methoxyethoxy)ethanol (cas: 111-77-3) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.Name: 2-(2-Methoxyethoxy)ethanol
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem