The aim of the present invention is to provide a multi-branched polymer, in which branch terminals can be easily modified and which have a high degree of branching and narrow dispersion. By polymerizing a compound having 2 or more polymerization-initiation sites and polymerizable unsaturated bonds with a living radical polymerization method using a metal catalyst, it is possible to produce a multi-branched polymer with narrow dispersion and a high degree of branching and having repeating units represented by the formula (I):
wherein R
1
to R
3
each independently represents hydrogen or a hydrocarbon group, R
1
may be bonded to R
3
to form a ring; X represents a connecting group having a valence of 3 or higher; Y may be the same or different and each represents a functional group which may have a halogen atom at a terminal thereof; and a is an integer of 2 or larger.
本发明的目的是提供一种多支化聚合物,其中支链末端可以容易地修改,并具有高度分支和窄分散度。通过使用
金属催化剂的活性自由基聚合方法聚合具有2个或更多聚合引发位点和可聚合不饱和键的化合物,可以产生具有窄分散度和高度分支的多支化聚合物,并具有由式(I)表示的重复单元:其中R1至R3各自独立表示氢或碳氢基团,R1可以与R3连接形成环;X表示具有3或更高价的连接基团;Y可以相同或不同,每个表示具有末端可能有卤素原子的功能基团;a是2或更大的整数。