| 摘要 |
<p>Disclosed is a narrow-distribution star polymer having a controlled molecular structure. Also disclosed is a method for simply producing such a star polymer. Specifically disclosed is a method for producing a star polymer, which comprises a step (A) wherein an arm (I) is formed by bonding an anion end of a polymer having an anion end to a core, and a step (B) wherein an arm (II) is extended from the core by living radical polymerization. Also specifically disclosed is a star polymer characterized by having a structure represented by the formula (I-1) or (I-2) below. (I-1) (I-2) (In the formula (I-1) or (I-2), B, C<SUB>1</SUB> and C<SUB>2</SUB> independently represent a group composed of a polymer; m<SUB>1</SUB> and m<SUB>2</SUB> independently represent an integer of 1 or 2; and when m<SUB>1</SUB> or m<SUB>2</SUB> is 2, C<SUB>1</SUB>'s or C<SUB>2</SUB>'s represent the same as or different groups.)</p> |
