Low-density polyethylene (LDPE)-based anion exchange membranes (AEMs) with 65% degree of grafting of vinylbenzyl chloride (VBC) were tethered with different amine functionalities namely, trimethyl amine (TMA), 1,4-diazabicyclo[2.2.2]octane (DABCO), 1-azabicyclo[2.2.2]octane (ABCO) and N-methylpiperidine (NMP), and were subjected to degradation test by immersing the OH⁻ exchanged AEMs in deionised water at 60 °C, a condition analogous to fuel cell and electrolyser environment. All the quaternised membranes, regardless of the tethered amine functional group, exhibited similar degradation loss of ca. 5% IEC per month. Benzylic peroxide was detected in the degradation solution in all the tested AEMs. The observed degradation of the OH⁻ exchanged AEMs was mainly attributed to peroxide and hydroxide radical attacks on the ternary (benzylic) carbon resulting in the release of vinylbenzyl trimethylammonium hydroxide (VBTMA) as a whole which was also detected. The degradation test performed on TMA-functionalised membrane under nitrogen, oxygen and 3 wt% H₂O₂ showed similar degradation products namely benzylic peroxide and VBTMA suggesting that the degradation mechanisms under these three conditions are similar. The over three-fold increase in the degradation rate under oxygen saturated solution compared to nitrogen is due to the higher peroxide concentration produced from oxygen reduction to superoxide via ylide.

具有65％乙烯基苄基氯（VBC）接枝度的低密度聚乙烯（LDPE）基阴离子交换膜（AEM）与不同的胺官能团，即三甲胺（TMA），1,4-二氮杂双环[2.2.2]捆绑在一起]辛烷（DABCO），1-氮杂双环[2.2.2]辛烷（ABCO）和N-甲基哌啶（NMP），并通过浸渍OH进行降解试验^-在去离子水中交换的AEM在60℃下，一个类似的条件燃料电池和电解槽的环境。所有的季铵化膜，不管束缚的胺官能团如何，都显示出相似的ca降解损失。每月5％IEC。在所有测试的AEM中，在降解溶液中均检测到过氧化苯甲酸。中的OH的所观察到的降解^-交换的AEM主要归因于过氧化物和氢氧根自由基对三元（苄基）碳的攻击，导致乙烯基苄基三甲基氢氧化铵（VBTMA）整体上的释放，也被检测到。在氮气，氧气和3 wt％H ₂ O ₂下在TMA功能化膜上进行的降解测试显示出相似的降解产物，即过氧化苄基和VBTMA，表明在这三个条件下的降解机理是相似的。与氮气相比，在氧气饱和的溶液中，降解速率提高了三倍以上，这是由于通过叶立德将氧气还原成超氧化物所产生的过氧化物浓度更高。