Rieger Elisabeth, Manhart Angelika, Wurm Frederik R
Max-Planck-Institut für Polymerforschung (MPI-P), Ackermannweg 10, D-55128 Mainz, Germany.
ACS Macro Lett. 2016 Feb 16;5(2):195-198. doi: 10.1021/acsmacrolett.5b00901. Epub 2016 Jan 19.
Acetal-protected and sulfonamide-activated aziridines (Az) have been prepared and polymerized by living anionic polymerization with molecular weight dispersities in most cases below < 1.2 and controlled molecular weights. Three new monomers have been prepared varying in the length of the pendant chain. The resulting double protected polymers can be selectively deprotected in order to release the polyamine or the polyol structures. Detailed structural characterization was performed for all polymers, and chain extension proves their living polymerization behavior and the formation of block copolymers. Thermal analysis can be used in order to follow the deprotection steps. These new protected monomers broaden the scope of the azaanionic polymerization of aziridines and may find useful applications as well-defined functional poly(ethylene imine) derivatives.
已制备出缩醛保护且磺酰胺活化的氮丙啶（Az），并通过活性阴离子聚合将其聚合，在大多数情况下，所得聚合物的分子量分散度低于1.2，分子量可控。制备了三种侧链长度不同的新型单体。所得的双保护聚合物可进行选择性脱保护，以释放多胺或多元醇结构。对所有聚合物进行了详细的结构表征，链增长证明了它们的活性聚合行为以及嵌段共聚物的形成。热分析可用于跟踪脱保护步骤。这些新型保护单体拓宽了氮丙啶氮杂阴离子聚合的范围，并且作为结构明确的功能性聚（乙烯亚胺）衍生物可能会有有用的应用。
