Abstract Ionic pair tetrabutylammonium halide (TBAX) was efficient initiator in anionic ring-opening polymerizations (AROPs) of N-sulfonyl aziridines, in which the tetrabutylammonium fluoride (TBAF) was the optimal initiator effect controlled/living AROPs. TBAX initiated AROPs of 2-methyl-N-tosylaziridine (TsMAz) by relative activities on halide X in sequence of F > Cl > Br > I, which was corroborated to the nucleophilicities of the halides. Homopolymers and diblock copolymers of TsMAz and EsMAz were prepared. The AROPs possessed living nature by first order kinetics with fast polymerizations (0.5 to several hours), high conversions (90–99%), narrow dispersities (Đ

中文翻译：

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四丁基氟化铵引发N-磺酰基氮丙啶的阴离子开环聚合

摘要 离子对四丁基卤化铵（TBAX）是N-磺酰基氮丙啶阴离子开环聚合（AROPs）的有效引发剂，其中氟化四丁基铵（TBAF）是最佳引发剂效应控制/活性AROPs。TBAX 通过对卤化物 X 的相对活性以 F > Cl > Br > I 的顺序启动 2-甲基-N-甲苯磺酰氮丙啶 (TsMAz) 的 AROP，这证实了卤化物的亲核性。制备了 TsMAz 和 EsMAz 的均聚物和二嵌段共聚物。AROPs 通过一级动力学具有活性，具有快速聚合（0.5 到几个小时）、高转化率（90-99%）、窄分散性（Đ