A new monomer-iniferter

allyl 2-N

N-diethyldithiocarbamylacetate (ADCA)

was synthesized from allyl alcohol with chloroacetyl chloride then the chlorine groups were subsequently reacted with sodium diethyldithiocarbamate. The ADCA was used for preparation of well-defined functionalized polystyrene via radical polymerization of styrene (St) in bulk under UV light irradiation at ambient temperature. The bulk polymerization of St with ADCA proceeded a “living" process

i.e.

both the yield and molecular weight of the resultant PSt increased with the increasing of reaction time

and the average number of end group Et2NCSS is about 1. The well-defined polymer was characterized by 1H-NMR and FT-IR spectroscopies to be an a-allyloxycarbonylmethylene-ω-diethyldithiocarbamyl-polystyrene.Under UV light irradiation

the C-S bond of ω-end groups of PSt can cleavage reversibly to initiate MMA polymerization forming a well-defined PSt-b-PMMA copolymer.