Research Papers by Dieter Lehmann

3. Results and discussion All base polymers were obtained after precipitation as white to beige powders in quantitative yields and with high molecular weights (hinh. > 0.5 dl/g). Membranes with a theoretical ionexchange capacity (IEC) ranging from 0 to 2.08 mmol/g (PES) or from 0 to 2.25 mmol/g (PPE