Azide-assisted terminal crosslinking of methyl morpholinium-functionalized poly(arylene ether sulfone) block copolymers yields products (xMM-PESs) suitable for use as anion exchange membranes. By combining the advantages of bulky morpholinium conductors and our unique polymer network crosslinked only at the termini of the polymer chains, we can produce AEMs that after the crosslinking show minimal loss in conductivity, yet with dramatically reduced water uptake. Terminal crosslinking also significantly increases the thermal, mechanical and chemical stability levels of the membranes. A high ion conductivity of 73.4 mS cm⁻¹ and low water uptake of 26.1% at 80 °C are obtained for the crosslinked membrane with higher amount of hydrophilic composition, denoted as xMM-PES-1.5-1. In addition, the conductivity of the crosslinked xMM-PES-1.5-1 membrane exceeds that of its non-crosslinked counterpart (denoted as MM-PES-1.5-1) above 60 °C at 95% relative humidity because of its enhanced water retention capacity caused by the terminally-crosslinked structure.

甲基吗啉鎓官能化的聚（亚芳基醚砜）嵌段共聚物的叠氮化物辅助的末端交联产生了适合用作阴离子交换膜的产物（xMM-PESs）。通过结合庞大的吗啉导体的优势和我们独特的仅在聚合物链末端交联的聚合物网络，我们可以生产出在交联后导电性损失最小，但吸水率大大降低的AEM。末端交联还显着提高了膜的热，机械和化学稳定性水平。73.4 mS cm ^-1的高离子电导率对于具有较高亲水组成量的交联膜，表示为xMM-PES-1.5-1，在80℃下的吸水率低，为26.1％。此外，交联的xMM-PES-1.5-1膜的电导率在95％相对湿度下超过60°C时超过其非交联对应膜（称为MM-PES-1.5-1）的电导率，因为其保水性增强由末端交联的结构引起的容量。