- PEG, PPG, PTMEG
Some of the most extensively studied polymers have been polyethers such as poly(ethylene glycol) PEG, poly(propylene glycol) PPG, and poly(tetramethylene glycol) PTMEG, because of their relatively simple backbones and wide range of commercial applications.
These polyethers are often used as surfactants and, more recently, as polymer electrolytes in fuel cells. In these cases, their ability to function properly strongly depends on how well they bind to alkali ions. Ion mobility measurements and molecular modeling calculations were used to investigate the gas-phase conformations of a series of PEG, PPG, and PTMEG oligomers cationized by a variety of alkali metals (Li+-Cs+) to determine how changes in the composition and flexibility of the polyether affects the polymer - metal interaction.