Novel Hyperbranched Polymer-Based Anion-Exchange Membranes
The main objective of the present study is to synthesize novel AEMs with excellent hydroxyl conductivity and mechanical stability from hyperbranched polyester polymers. More specifically, poly (vinyl pyridine) (PVP) was grafted onto bis-MPA polyester-64-hydroxyl via graft copolymerization and subsequently quaternized using different alkylating agents. The effects of some variables such as grafting degree and alkylating agent on the morphology as well as on the materials properties of these new-developed membranes were evaluated. The cation stability in alkaline media and the water uptake of these AEMs were also investigated. Some characterization techniques such as NMR, SAXS, FTIR, TEM, TGA, DSC and impedance spectroscopy were used to assess the materials properties of these membranes.