一种新型单体引发转移终止剂合成精细结构功能化的聚苯乙烯

SYNTHESIS OF WELL-DEFINED FUNCTIONALIZED POLYSTYRENE BY A NEW MONOMER INIFERTER

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 Et 2NCSS is about 1. The well\|defined polymer was characterized by 1 H\|NMR and FT IR spectroscopies to be an α-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.