Design of Living Cationic Polymerization Systems Exploiting the Characteristics of Lewis Acid Catalysts

本研究的目的是利用刘易斯酸催化剂的特性，建立新型的可控阳离子聚合引发体系。主要成果如下：（1）阐明了刘易斯酸的结构与阳离子聚合行为之间的关系，（2）开发了一种用于活性聚合的金属络合物催化剂的简便方法，（3）不需要刘易斯酸催化剂的活性阳离子聚合，（4）通过交叉增长反应进行乙烯基和环状单体的共聚合，和（5）烷氧基环氧乙烷的受控阳离子开环聚合。

The aim of this research was to establish new initiating systems for controlled cationic polymerizations by utilizing the characteristics of Lewis acid catalysts. The main achievements are as follows: (1) the elucidation of the relationship between the Lewis acids' structures and the cationic polymerization behaviors, (2) the development of a facile method that generates metal complex catalysts for living polymerization, (3) the living cationic polymerization that does not require Lewis acid catalysts, (4) the copolymerization of vinyl and cyclic monomers through crossover propagation reactions, and (5) the controlled cationic ring-opening polymerization of an alkoxyoxirane.