Hybrid anion exchange membranes with adjustable ion transport channels designed by compounding <scp>SEBS</scp> and homo‐polystyrene

Hybrid anion exchange membranes (AEMs) were prepared via chemically functionalizing and crosslinking poly(styrene-b-[ethylene-co-butylene]-b-styrene) (SEBS) copolymers low molecular weight homo-polystyrene (hPS). Via sequential chloromethylation, crosslinking, quaternization, alkalization, a series of hPS/SEBS AEMs obtained with varying content hPS. Systematic structural, morphological, mechanical, absorption, transport measurements reveal that these properties depend on the total PS in membranes. Particularly, increasing causes (a) domains transition cylindrical morphology to lamella-like comparable correlation length; (b) Young's modulus, water uptake, swelling ratio, ionic capacity conductivity AEMs, Tg phase increase. In addition, alkaline stability is also improved by addition These findings suggest proposed method can develop high performance SEBS are suitable for fuel cell applications.