| 摘要 |
A hyperbranched polymer in which branch terminals can be easily modified and which has a high degree of branching and a narrow dispersion. A compound having two or more polymerization- initiation sites and polymerizable unsaturated bonds is polymerized by living radical polymerization using a metal catalyst. Thus, a hyperbranched polymer having a narrow dispersion and a high degree of branching can be produced which has repeating units represented by the formula (I): (I) wherein R1 to R3 each independently represents hydrogen or a hydrocarbon group, provided that R1 may be bonded to R3 to form a ring; X represents a connecting group having a valance of 3 or higher; Y's may be the same or different and each represents a functional group optionally terminated by halogeno; and a is an integer of 2 or larger.
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