Alkaline exchange membranes (AEMs), also called anion exchange membranes, allow transportation of anions (ex: OH-, Cl-, Br-, etc.) from the cathode to the anode in electrochemical reaction. AEMs are the most critical component of AEM fuel cells, water electrolysis, and certain batteries, sensors, and actuators. Many AEM materials tend to degrade easily under high alkaline. This technology comprises new chemical structures composed of styrene-butadiene block copolymer functionalized with quaternized ammonium groups toovercomes this alkaline stability issue.