作　　者： ; ; ;

机构地区： 西南石油大学石油工程学院油气藏地质及开发工程国家重点实验室

出　　处： 《高等学校化学学报》 2008年第10期2118-2120,共3页

摘　　要： A new approach to the synthesis of dendrimer-like star polymer,[(PMMA)2PSt]4,was presented via the combination of atom transfer radical polymerization(ATRP) and ckick chemistry.Firstly four-arm bromine-terminated polystyrene(PSt-Br)4 was obtained from ATRP of styrene using pentaerythritol tetra(2-bromoisobutyrate) as an initiator,and the(PSt-Br)4 was efficiently converted to the azido-terminated polymers[(PSt-N3)4] through the bromine substitution reaction with sodium azide.Furthermore,the(PSt-N3)4 reacted with propargyl 2,2-bis[2-(bromomethyl)propionato]propionyrate via a click reaction,1,3-dipolar cycloaddition reaction,and the polymer[(PSt-Br2)4] containing eight end-bromine was obtained.The(PSt-Br2)4 could further serve as a macroinitiator for the ATRP of methyl methacrylate(MMA).Accordingly,the dendrimer-like star polymer,[(PMMA)2PSt]4 was successfully prepared.The structure of [(PMMA)2PSt]4 was characterized via IR,1H NMR,GPC and DSC. A new approach to the synthesis of dendrimer-like star polymer, [ （PMMA） zPSt ] 4, was presented via the combination of atom transfer radical polymerization （ATRP） and ckick chemistry. Firstly four-arm bromine-terminated polystyrene （PSt-Br）4 was obtained from ATRP of styrene using pentaerythritol tetra （2- bromoisobutyrate） as an initiator, and the （PSt-Br）4 was efficiently converted to the azido-terminated polymers [ （PSt-N3）4 ] through the bromine substitution reaction with sodium azide. Furthermore, the （PSt-N3 ）4 reacted with propargyl 2,2-bis [2-（bromomethyl） propionato ] propionyrate via a click reaction, 1,3-dipolar cycloaddition reaction, and the polymer [ （PSt-Br2 ）4 ] containing eight end-bromine was obtained. The （ PSt-Br2 ） a could further serve as a macroinitiator for the ATRP of methyl methacrylate （MMA）. Accordingly, the dendrimer-like star polymer, [（ PMMA ）2PSt ]4 was successfully prepared. The structure of [ （PMMA）2PSt]4 was characterized via IR, ^1H NMR, GPC and DSC.

关 键 词： 原子转移自由基聚合 点击化学 树状星型聚合物

领　　域： [理学] [理学]