3-Chloro-2-（chloromethyl）-1-propene（CCMP） was synthesized and used to initiate atom transfer radical polymerization（ATRP） of styrene catalyzed by copper（Ⅰ） chloride/2,2′-bipyridine at 125℃.As a difunctional initiator,CCMP can initiate ATRP of styrene with two living end sites at the same time.The structure of the obtained α,ω-chloropolystyrene was confirmed by（）1H-NMR spectra.The living character of the ATRP process is indicated by narrow molecular weight distributions of the obtained polystyrene（Mw/Mn<1.5）,a linear（ln（[M]0/[M]）） versus time profile and predictable molecular weights proportional to monomer conversion.
