Disclosed are an acrylic acid-based polymer which is a star polymer containing a repeating unit derived from an (α-lower alkyl)acrylic ester represented by formula (I):
(wherein R
1
represents a hydrogen atom or a lower alkyl group, and R
2
represents an organic group having a polar group) in an arm portion; an acrylic acid-based polymer containing a repeating unit derived from an poly(α-lower alkyl)acrylic ester and a repeating unit derived from an (α-lower alkyl)acrylic ester represented by formula (I), and a method for producing a polymer through living polymerization, comprising forming an oligomer having a polymerization active end, which is an oligomer higher than an average 1.0-mer and lower than an average 4.0-mer or an average 4.0-mer, and polymerizing using the oligomer having a polymerization active end as an initiating species.
本发明涉及一种基于
丙烯酸的星型聚合物,其包含来自式(I)所表示的(α-较低烷基)
丙烯酸酯的重复单元的臂部分;以及一种基于
丙烯酸的聚合物,其包含来自聚(α-较低烷基)
丙烯酸酯和式(I)所表示的(α-较低烷基)
丙烯酸酯的重复单元,并且本发明还提供了通过活性聚合制备聚合物的方法,包括形成具有聚合活性端的寡聚体,该寡聚体高于平均1.0-聚体但低于平均4.0-聚体或平均4.0-聚体,并以具有聚合活性端的寡聚体作为引发物种进行聚合。