A series of graft copolymers were synthesized by ATRP initiated with macroinitiators which had been made from copolymerization of \%p\%\|chloromethylstyrene and other monomers, such as methyl methacrylate, butyl methacrylate, acrylonitrile, styrene, vinyl acetate, isobutene\|maleic anhydride, styrene\|maleic anhydride \%etc.\%. The graft copolymers were characterized by IR and \{\}\+1H NMR spectra. The numbers of graft points or the branches on the graft copolymers were determined by Ion Chromatography. Th