It is found that free radicals of OH would be generated in KOH solutions at elevated temperatures according to the results of fluorescence analysis. Five kinds of radical inhibitors (tert-butylphenol-containing reagents, 4-amino-tempo, benzophenone, phenothiazine and N-phenyl-1-naphthylamine) were employed as the dopant, separately, to prepare anion exchange membranes (AEMs) based on poly(4-vinylbenzylchloride-styrene). The investigaions on the properties of the prepared AEMs indicate that more radicals might be produced during the degradation of the AEMs via chain propagation reactions. Moreover, the influences of the radical inhibitors on the degradation of the AEMs in 8 M KOH solutions at 80 °C are quite different although all these inhibitors could react with OH radicals. Therein the radical inhibitors o-, m-, p-tert-butylphenols could effectively enhance the chemical stability of the AEMs. However, when the phenol-containing inhibitors have a large substituent group in its benzene ring, the membranes tend to be brittle during the stability test.

根据荧光分析的结果，发现在高温下在KOH溶液中会产生OH的自由基。分别使用五种自由基抑制剂（含叔丁基苯酚的试剂，4-氨基-速度，二苯甲酮，吩噻嗪和N-苯基-1-萘胺）作为掺杂剂，以制备基于聚乳酸的阴离子交换膜（AEM）。 （4-乙烯基苄基氯-苯乙烯）。对制备的AEM的性能的研究表明，在AEM降解过程中，通过链增长反应可能会产生更多的自由基。而且，自由基抑制剂对在80°C的8 M KOH溶液中AEM降解的影响是完全不同的，尽管所有这些抑制剂都可以与OH自由基。在其中的自由基抑制剂ø - ，米- ，p -叔丁基苯酚可以有效地提高的AEM的化学稳定性。然而，当含苯酚的抑制剂在其苯环中具有大的取代基时，在稳定性测试过程中膜倾向于变脆。