| abstract |
Without purification, a multi-branched polymer with uniform molecular chain length and no branch defects is synthesized. In the polyfunctional radical polymerization initiator represented by the following (formula 1), n is a natural number of 1 or more, Y is a polyfunctional unsaturated compound, R 1 is a hydrocarbon group, and R 2 is radical polymerization. unsaturated hydrocarbon compounds having a gender, between R 1 and an oxygen atom, a structure in which one molecule binds, B-X 1 (boron -X 1) X 1 binding is an alkoxy group or a phenyl group, A polymerization initiator, wherein X 2 of a BX 2 (boron-X 2 ) bond is an alkoxy group or a phenyl group. [Chemical 1] |